Voyage Planning, Position Fixing, Gyro and Magnetic Compasses

Question 1

If the observer is at 5˚ South and the sun’s declination is 10˚ North, what will be the bearing of the body during meridian passage? …………..Sun 10° N ^ The Sun is North ……………. ^ of the Observer, ……………Obs 5° S ^ therefore, the ……………………………….. bearing of the …………………………….. …body is NORTH. NOTE: In answering this kind of question, you have to plot the Position of the “OBSERVER” and the Position of the “SUN”. …………If the “SUN” is North or above the “OBSERVER”, the bearing is NORTH or 000°T. ………..If the “SUN” is South or below the “OBSERVER”, the bearing is SOUTH or 180°T.

Answer 1

North

Question 2

If the observer is at 5˚ South and the sun’s declination is 10˚ North, what will be the bearing of the body during meridian passage?

Answer 2

000 deg.T

Question 3

If the observer is at 5˚ North and the sun’s declination is 10˚ South, what will be the bearing of the body during meridian passage?

Answer 3

South

Question 4

If the observer is at 5˚ North and the sun’s declination is 10˚ South, what will be the bearing of the body during meridian passage?

Answer 4

180 deg.T

Question 5

If the observer is at 5˚ North and the sun’s declination is 10˚ North, what will be the bearing of the body during meridian passage?

Answer 5

North

Question 6

If the observer is at 10˚ North and the sun’s declination is 5˚ North, what will be the bearing of the body during meridian passage?

Answer 6

South

Question 7

If the observer is at 10˚ North and the sun’s declination is 5˚ South, what will be the bearing of the body during meridian passage?

Answer 7

180 deg.T

Question 8

If the observer is at 5˚ North and the sun’s declination is 10˚ North, what will be the bearing of the body during meridian passage?

Answer 8

000 deg.T

Question 9

If the observer is at 10˚ North and the sun’s declination is 15˚ North, what will be the bearing of the body during meridian passage?

Answer 9

North

Question 10

If the observer is at 10˚ North, and the sun is at summer solstice, what will be the bearing of the body during meridian passage?

Answer 10

North

Question 11

If the observer is at 40˚North, and the sun is at summer solstice, what will be the bearing of the body during meridian passage?

Answer 11

South

Question 12

If the observer is at 10˚ North, and the sun is at summer solstice, what will be the bearing of the body during meridian passage?

Answer 12

000 deg.T

Question 13

If the observer is at 40˚ North, and the sun is at summer solstice, what will be the bearing of the body during meridian passage?

Answer 13

180 deg.T

Question 14

If the observer is at 10˚ South, and the sun is at summer solstice, what will be the bearing of the body during meridian passage?

Answer 14

North

Question 15

If the observer is at 10˚ South, and the sun is at summer solstice, what will be the bearing of the body during meridian passage?

Answer 15

000 deg.T

Question 16

If the observer is at 10˚ South, and the sun is at winter solstice, what will be the bearing of the body during meridian passage?

Answer 16

South

Question 17

If the observer is at 10˚ South, and the sun is at winter solstice, what will be the bearing of the body during meridian passage?

Answer 17

180 deg.T

Question 18

If the observer is at 40˚ South, and the sun is at winter solstice, what will be the bearing of the body during meridian passage?

Answer 18

North

Question 19

If the observer is at 40˚ South, and the sun is at winter solstice, what will be the bearing of the body during meridian passage?

Answer 19

000 deg.T

Question 20

Find the latitude of the observer if the sun’s altitude at upper transit is 75˚ bearing North and the declination is 10 deg North.

Answer 20

5 deg. S

Question 21

Find the latitude of the observer if the sun’s altitude at upper transit is 50˚ bearing South and the declination is 5˚ South.

Answer 21

35 deg. N

Question 22

Find the latitude of the observer if the sun’s altitude at upper transit is 50˚ bearing South and the declination is 10˚ South.

Answer 22

30 deg. N

Question 23

Find the latitude of the observer if the sun’s altitude at lower transit is 10˚ bearing South and the declination is 70˚ South.

Answer 23

30 deg. S

Question 24

At meridian passage, upper transit, Ho of the sun is 39˚19.3’, bearing North. Declination of the sun is 23˚38.2’ South. Find latitude at transit(U.T.) …….. .. Ho = 39° 19.3’ N…………………….. …..(-) 90° ( always - 90 ) MZD = 50° 40.7’ S same sign +… . Dec = 23° 38.2’ S (+) diff sign - .Lat = 74° 18.9’ S ……………… ………………………………………………………………..NOTE: If the sign of Ho is “North”, then the sign of MZD will be “South” . If Ho is “South”, MZD will be “North”.(Always reverse the sign)

Answer 24

74˚18.9’ S

Question 25

At meridian passage, upper transit, Ho of the sun is 48˚11.6’, bearing South. Declination of the sun is 1˚46.3’ North. Find latitude at transit.

Answer 25

43˚34.7’ N

Question 26

At meridian passage, upper transit, Ho of the sun is 76˚46.5’, bearing North. Declination of the sun is 20˚10.5’ North. Find latitude at transit.

Answer 26

9˚57.0’ N

Question 27

The Observed altitude (Ho) of Star Kochab at meridian passage, lower transit is 16˚11.5’. The star’s declination is 74˚16.2’ North. Find latitude (L.T.) …………………………………………………………… Dec = 74° 16.2’ N .. ( - ) 90° ………………….. ……… .PX = 15° 43.8’ ……….. . . … Ho = 16° 11.5’ ( always + )…. …. … Lat = 31° 55.3’ N (same name as Dec)

Answer 27

31˚55.3’ N

Question 28

The Observed altitude (Ho) of Star Deneb at meridian passage, lower transit is 15˚23.5’. The star’s declination is 45˚16.6’ North. Find latitude.

Answer 28

60˚06.9’ N

Question 29

On April 22, in longitude 098˚East, the observed altitude (Ho) of the Sun’s U.L. at meridian passage was 54˚42.2’ bearing North, declination is 11˚42.1’ N. Calculate the observer’s latitude.

Answer 29

23˚35.7’ S

Question 30

On Jan. 16, in longitude 132˚54’W, the observed altitude (Ho) of the Sun’s L.L. at meridian passage was 64˚04.2’ bearing North, declination is 21˚58.5’S. Calculate the observer’s latitude.

Answer 30

47˚54.3’ S

Question 31

The observed meridian altitude (Ho) fo the star Sirius (lower transit) was 14˚03.9’ bearing South. Find the observer’s latitude if the declination is 16˚43’ S.

Answer 31

87˚20.9’ S

Question 32

At meridian passage, upper transit, the observer’s latitude was found to be 43˚34.7’ North, Declination is 1˚46.3’ North. Find the Observed Altitude (Ho).

Answer 32

48˚11.6’ S

Question 33

At meridian passage, upper transit, the observer’s latitude was found to be 9˚57’ North, Declination is 20˚10.5’ North. Find the Observed Altitude (Ho).

Answer 33

79˚4.5’ N

Question 34

The Meridian Altitudes of a celestial body are 12˚ and 68˚, North and South respectively from the navigator. Calculate the latitude.

Answer 34

62˚ N

Question 35

The Meridian Altitudes of a celestial body are 12˚ and 68˚, North and South respectively from the navigator. Calculate declination of the celestial body.

Answer 35

40˚ N

Question 36

The Meridian Altitudes of a celestial body are 12˚ and 68˚, North and South respectively from the navigator. Calculate the true altitude of the celestial body when it crosses the prime vertical.

Answer 36

46˚43’ N

Question 37

What is the latitude of a place where the sun is exactly at the zenith of the observer at Local Apparent Noon (LAN) of June 21?

Answer 37

23˚27’ N

Question 38

What is the latitude of a place where the sun is exactly at the zenith of the observer at Local Apparent Noon (LAN) of December 22?

Answer 38

23˚27’ S

Question 39

What is the latitude of a place where the sun is exactly at the zenith of the observer at Local Apparent Noon (LAN) of March 21?

Answer 39

at the equator

Question 40

What is the latitude of a place where the sun is exactly at the zenith of the observer at Local Apparent Noon (LAN) of September 22 or 23?

Answer 40

0 deg. Latitude

Question 41

On June 10 in Longitude 058˚42’E, the sextant meridian altitude (Hs) of the sun’s U.L. was 87˚32.0’ bearing South, I.E. 1.3’ on the arc. DIP correction is 4.8’, Main corr. Is 15.9’. Calculate the latitude of the observer if the sun’s declination from the almanac indicates 23˚17.4’ North.

Answer 41

26˚07.4’ N

Question 42

The observed meridian altitude (Ho) fo the star Sirius (lower transit) was 14˚03.9’ bearing South. Find the observer’s latitude if the declination is 16˚43’ South.

Answer 42

87˚20.9’ S

Question 43

On Jan. 20, at GMT 22h 53m 40s, in longitude 041˚26’W, the observed altitude (Ho) of the star Polaris was 35˚54.9’ . The correction values determined by Polaris tables are Ao = 0˚ 53.2’, A1 = 0.4’ A2 = 0.7’. Calculate the observer’s latitude.

Answer 43

35˚49.2’ N

Question 44

On Sept. 12, at GMT 10h35m 00s LZT in longitude 057˚ 58’ W, the Ho of star Polaris was 35˚50’. The correction values from the Polaris Tables: Ao = 1˚22.1’, A1 = 0.4’, A2 =0.9’ Find the latitude of the observer.

Answer 44

36˚13.4’ N

Question 45

Find the latitude of the observer if the true altitude of Polaris is 34˚17.6’. The correction values from the Polaris Tables: Ao = 0˚58.5’, A1 = 0.6’, A2 = 0.9’

Answer 45

34˚17.6’ N

Question 46

The mean radius of the Earth is 3440 nautical miles, find the radius of the parallel of Latitude of Manila (Lat. 14˚30’ N approximately)

Answer 46

3330.4 nm

Question 47

The Earth is not a true sphere so that the equatorial radius is larger than the polar radius. The difference is _____.

Answer 47

13.5 miles

Question 48

Given equatorial radius of the Earth as 3444 nm, find radius of a parallel of latitude at 70˚N or S

Answer 48

1177.9 nm

Question 49

With an equatorial radius of the Earth of 3444nm find circumference of a parallel of latitude 30˚N

Answer 49

18740.2 nm

Question 50

At what rate per hour is the Royal observatory at Greenwich (Latitude 51˚28.5’ N) being carried around the Earth’s axis?

Answer 50

560.6 knots

Question 51

At what rate per hour is the Latitude 23˚20’ N being carried around the Earth’s axis?

Answer 51

826.4 knots

Question 52

At what rate per hour is latitude 60˚00’ S being carried around the Earth’s axis?

Answer 52

450 nm/hr

Question 53

At what rate per hour is latitude 45 deg. North being carried around the Earth’s axis?

Answer 53

636.4 nm/hr

Question 54

At what rate per hour is latitude 36˚38’ South being carried around the Earth’s axis?

Answer 54

722.22 nm/hr

Question 55

With a given mean radius of the Earth as 3440 nm, calculate the radius of a parallel of latitude at 46˚24’ North.

Answer 55

2372.3 nm

Question 56

Assuming the equatorial radius of the Earth as 3444 nm, find te circumference of the equator?

Answer 56

21639.3 nm

Question 57

The distance between two meridians is 427 nautical miles in Latitude 50˚20’ N. What is the angle at the pole?

Answer 57

11˚08.9’

Question 58

The distance between two meridians is 600 nautical miles in Latitude 45˚20’ N. What is the angle at the pole?

Answer 58

22˚16.9’

Question 59

The distance between two meridians is 248 nautical miles in Latitude 63˚20’ N. What is the angle at the pole?

Answer 59

9˚12.6’

Question 60

The distance between two meridians is 127 nautical miles in Latitude 39˚30’ N. What is the angle at the pole?

Answer 60

2˚44.5’

Question 61

The distance between two meridians is 724 nautical miles in Latitude 20˚50’ N. What is the angle at the pole?

Answer 61

12˚54.6’

Question 62

The distance between two meridians is 600 nautical miles in Latitude 45˚20’ N. Find the Difference of Longitude (Dlo) between the 2 meridians.

Answer 62

22˚16.9’

Question 63

In what latitude will a departure of 300 nm corresponds to a Dlo of 6˚40’?

Answer 63

41˚24.6’ N or S

Question 64

In what latitude will a departure of 250 nm corresponds to a Dlo of 6˚40’?

Answer 64

51˚19.1’ Nor S

Question 65

In what latitude will a departure of 200 nm corresponds to a Dlo of 4˚16’ ?

Answer 65

38˚37.5’ N or S

Question 66

On a certain parallel, the distance between two meridians is 250 nm while the Dlo between the meridians is 12˚30’. What is the latitude?

Answer 66

70˚31.9’ N or S

Question 67

On a certain parallel, the distance between two meridians is 340 nm while the Dlo between the meridians is 18˚30’. What is the latitude?

Answer 67

72˚09.8’ N or S

Question 68

In Latitude 50˚10’ N, the departure between two meridians is 360 nautical miles. What is the Difference of Longitude?

Answer 68

9˚22’

Question 69

In Latitude 45˚20’ N, the departure between two meridians is 430 nautical miles. What is the Difference of Longitude?

Answer 69

10˚11.7’

Question 70

In Latitude 20˚40’ N, the departure between two meridians is 130 nautical miles. What is the Difference of Longitude?

Answer 70

2˚19’

Question 71

In Latitude 38˚20’ N, the departure between two meridians is 530 nautical miles. What is the Difference of Longitude?

Answer 71

11˚15.6’

Question 72

A ship steams on a course of 090˚T from port A in latitude 23˚30’ N; Long. 059˚10’E to Port B in Latitude 23˚30’ N; Longitude 065˚30’E. How far did she steam?

Answer 72

348.5 nm

Question 73

A ship steams on a course of 270˚T from port A in latitude 23˚30’ N; Long. 059˚10’E to Port B in Latitude 23˚30’ N; Longitude 065˚30’E. How far did she steam?

Answer 73

348.5 nm

Question 74

In Latitude 50˚20’N, a vesse steams from Long. 015˚46’W to Long. 031˚18’W. What distance was made good?

Answer 74

594.9 nm

Question 75

On a certain parallel, the distance betweeen two meridians is 150 nm. On the equator the distance between the same two meridians is 235 nautical miles. What is the latitude of the parallel?

Answer 75

50˚20.1’ N or S

Question 76

On a certain parallel, the distance betweeen two meridians is 400 nm. On the equator the distance between the same two meridians is 470 nautical miles. What is the latitude of the parallel?

Answer 76

31˚40.3. N or S

Question 77

On a certain parallel, the distance betweeen two meridians is 250 nm. On the equator the distance between the same two meridians is 330 nautical miles. What is the latitude of the parallel?

Answer 77

40˚44.9’ N or S

Question 78

On a certain parallel, the distance betweeen two meridians is 25 nm. On the equator the distance between the same two meridians is 30 nautical miles. What is the latitude of the parallel?

Answer 78

33˚33’ N or S

Question 79

On a certain parallel, the distance betweeen two meridians is 50 nm. On the equator the distance between the same two meridians is 150 nautical miles. What is the latitude of the parallel?

Answer 79

70˚31.7’ N or S

Question 80

On a certain parallel, the distance betweeen two meridians is 130 nm. On the equator the distance between the same two meridians is 330 nautical miles. What is the latitude of the parallel?

Answer 80

66˚48’ N or S

Question 81

On a certain parallel, the distance betweeen two meridians is 15 nm. On the equator the distance between the same two meridians is 30 nautical miles. What is the latitude of the parallel?

Answer 81

60˚00’ N or S

Question 82

On a certain parallel, the distance betweeen two meridians is 40.8 nm. On the equator the distance between the same two meridians is 81.6 nautical miles. What is the latitude of the parallel?

Answer 82

60˚00’ N or S

Question 83

On a certain parallel, the distance betweeen two meridians is 20 nm. On the equator the distance between the same two meridians is 80 nautical miles. What is the latitude of the parallel?

Answer 83

75˚31.3’ N or S

Question 84

On a certain parallel, the distance betweeen two meridians is 120 nm. On the equator the distance between the same two meridians is 280 nautical miles. What is the latitude of the parallel?

Answer 84

64˚37.4’

Question 85

On a certain parallel, the distance betweeen two meridians is 2350 nm. On the equator the distance between the same two meridians is 4860 nautical miles. What is the latitude of the parallel?

Answer 85

61˚05’ N or S

Question 86

On a certain parallel, the distance betweeen two meridians is 2123 nm. On the equator the distance between the same two meridians is 8130 nautical miles. What is the latitude of the parallel?

Answer 86

74˚51.8’ N or S

Question 87

On a certain parallel, the distance betweeen two meridians is 235 nm. On the equator the distance between the same two meridians is 350 nautical miles. What is the latitude of the parallel?

Answer 87

47˚49.3’ N or s

Question 88

On a certain parallel, the distance betweeen two meridians is 320 nm. On the equator the distance between the same two meridians is 680 nautical miles. What is the latitude of the parallel?

Answer 88

61˚55.6’ N or S

Question 89

On a certain parallel, the distance betweeen two meridians is 240 nm. On the equator the distance between the same two meridians is 670 nautical miles. What is the latitude of the parallel?

Answer 89

69˚00’ N or S

Question 90

A vessel steers a course of 146˚T from Lat. 35˚10’N to Lat. 8˚46’ N. How far did she steam?

Answer 90

1910.7 nm

Question 91

A vessel sails from Lat.21˚45’N; Long.023˚56’ W on course 146˚ T for a distance of 300 nm. Find the Latitude and Longitude of Arrival by mercator Sailing.

Answer 91

Lat. 17˚36.3’ N; Long. 026˚53.1’W

Question 92

Find the DLAT and Depature made good if a vessel steams for 1936 nautical miles on course 248˚ T

Answer 92

Dlat 725.2’ S; Dep. 1795.1’

Question 93

Find the DLAT and Depature made good if a vessel steams for 435 nautical miles on course 026˚ T

Answer 93

Dlat 391.0’ N; Dep. 190.7’

Question 94

Find the DLAT and Depature made good if a vessel steams for 341 nautical miles on course 215˚ T

Answer 94

Dlat 279.3’ S; Dep 195.6’

Question 95

A vessel makes a Dlat of 289.4’ N and a departure of 203.2 nautical miles. Find the course and distance.

Answer 95

Course 324˚55.5’; Dist. 353.6’

Question 96

In latitude 50˚20’ N, a vessel steams 270˚T from Long. 015˚ 46’ W to Long. 031˚18’ W. Find the distance made good.

Answer 96

594.9 nm

Question 97

A vessel steams 470 nautical miles along the parallel of “x” North from Long.015˚35’ W to Long. 027˚20’ W. What is the latitude of “x” ?

Answer 97

Lat. 48˚ 11.3’ North

Question 98

From Latitude 39˚00’N; 033˚10’W, a ship steams on course 270˚T at 10 knots for 3 days and 8 hours. Find arrival position.

Answer 98

Lat. 39˚00’ N; Long. 050˚ 19.4’ W

Question 99

Two ports A and B are in the Northern Hemisphere. On the parallel of Port A, the distance between their meridians is 250 nm. On the parallel of Port B it is 350 nm and on the equator it is 400 nm. What are the Latitudes of the ports?

Answer 99

Lat 51˚19.1’ N for Port A Lat 28˚57.3’ N for Port B

Question 100

A ship steams 090˚T for 200 nautical miles in Lat. 49˚10’ N. By how much will her clocks have to be advanced?

Answer 100

20m 23s

Question 101

Your vessel receivesa distress call from a vessel reporting her position as LAT 35˚01’ S; LONG. 018˚51’ W. Your position is LAT 35˚01’ S; LONG.021˚42’ W. Determine what will be your True Course and distance to the vessel in distress by parallel sailing method.

Answer 101

090˚T, 140 nm

Question 102

A vessel in Latitude 55˚12’ N sails on course 270˚T and made a Dlo of 21˚36.6’. If the time taken was 3 days 2 hours, find the vessel’s speed.

Answer 102

10 knots

Question 103

On a certain parallel, a vessel must steam one nautical mile to alter her longitude by 2 minutes. What is the latitude of the parallel?

Answer 103

Lat. 60˚ N or S

Question 104

A ship “A” is on the equator steering 090˚T at 16 knots; while a ship “B” is on a parallel of North latitude, steering 270˚T at 12 knots. When “A” makes a Dlo of 1’, “B” makes a Dlo of 48’. Calculate the latitude of “B”.

Answer 104

Lat 20˚ 22’

Question 105

A ship in Latitude 59˚40’ sailed on a certain course until the D.M.P. was twice the DLat. Calculate the Latitude reached.

Answer 105

Lat. 60˚ 20’ N or S

Question 106

By sailing due East for a distance of 245 nautical miles, a ship alters her longitude by 7˚25’. Find Latitude of the ship.

Answer 106

Lat. 56˚ 36’ N or S

Question 107

Find the distance between initial position at Lat1. 50˚0’ N; 178˚0’ W and Lat2. 50˚00’ N; Long. 179˚ 00’E.

Answer 107

116 nm

Question 108

Your ship departs Yokohama, Japan from position Lat. 35˚27’ N; Long. 139˚39’ E bound for San Francisco, California,USA. At position Lat. 37˚48.5’ N, Long. 122˚24’ W. Determine the course and distance by Mercator sailing only.

Answer 108

088.3˚T; dist. 4738.4 miles

Question 109

Your ship departs Yokohama, Japan from position Lat. 35˚27’ N; Long. 139˚39’ E bound for San Francisco, California,USA. At position Lat. 37˚48.5’ N, Long. 122˚24’ W. Determine the distance by Great Circle sailing.

Answer 109

4473 miles

Question 110

Your ship departs Yokohama, Japan from position Lat. 35˚27’ N; Long. 139˚39’ E bound for San Francisco, California,USA. At position Lat. 37˚48.5’ N, Long. 122˚24’ W. Determine the initial course by Great Circle sailing.

Answer 110

054.3˚T

Question 111

Your ship departs Yokohama, Japan from position Lat. 35˚27’ N; Long. 139˚39’ E bound for San Francisco, California,USA. At position Lat. 37˚48.5’ N, Long. 122˚24’ W. Determine the Latitude of the Vertex (Lv) by Great Circle sailing.

Answer 111

Lv = 48˚35.9’ N

Question 112

Your ship departs Yokohama, Japan from position Lat. 35˚27’ N; Long. 139˚39’ E bound for San Francisco, California,USA. At position Lat. 37˚48.5’ N, Long. 122˚24’ W. Determine the Longitude of the Vertex (Lv) by Great Circle sailing.

Answer 112

Longv = 169˚14’ W

Question 113

Determine the great circle distance and intial course from Lat. 27˚51’ N; Long. 071˚41’ W to Lat. 49˚ 45’ N; Long. 006˚14’ W ?

Answer 113

3214 nm, 046.9˚T

Question 114

Determine the great circle distance and intial course from Lat. 36˚00’ S; Long. 056˚00’ W to Lat. 34˚ 00’ N; Long. 018˚15’ E ?

Answer 114

3557 nm; 112˚T

Question 115

Determine the great circle distance and intial course from Lat. 24˚52’ N; Long. 078˚27’ W to Lat. 47˚ 19’ N; Long. 006˚ 42’ W ?

Answer 115

3593 nm; 048.1˚T

Question 116

The great circle distance from Lat. 35˚57.2’ N, Long. 005˚45.7’ W to Lat. 24˚25.3’ N; Long 083˚02.6’ W is 3966.5 nautical miles and the initial course is 283.7˚T. The latitude of the vertex is 38˚09.4’ N. What is the longitude of the vertex?

Answer 116

028˚ 18.5’ W

Question 117

The great circle distance from Lat. 08˚50’ N, Long. 080˚21’ W to Lat. 12˚36’ N; Long 128˚16’ E is 8664 nautical miles and the initial course is 306.6˚T. The latitude of the vertex is 37˚39.6’ N. What is the longitude of the vertex?

Answer 117

157˚44’ W

Question 118

You are on a great circle track departing from LAT. 25˚50’ N; LONG. 077˚00’ W and your initial course is 061.7˚T. The position of the vertex is LAT 37˚35.6’ N; LONG. 025˚57.8’ W. What is the distance along the great circle track between the point of dep

Answer 118

2664.9 nm

Question 119

The great circle distance from Lat. 35˚08’ S, Long. 019˚26’ E to Lat. 33˚16’ S; Long 115˚36’ E is 4559 nautical miles and the initial course is 121˚T. Determine the latitude of the vertex?

Answer 119

45˚30’ S

Question 120

The latitude and longitude of the vertex along your great circle course is 38˚15’S, 168˚19’W. Your vessel is on course 102˚T. Which of the following is your course when crossing the equator?

Answer 120

051.8˚T

Question 121

The latitude and longitude of the vertex along your great circle course is 38˚15’S, 168˚19’E. Your vessel is on course 060˚T. Which of the following is your longitude when crossing the equator?

Answer 121

101˚21’ W

Question 122

The latitude and longitude of the vertex along your great circle course is 43˚32’S, 039˚18’ E. Your vessel is on course 246˚T. Which of the following is your course when crossing the equator?

Answer 122

313.5˚ T

Question 123

A great circle crosses the equator at 134˚ E. It will also cross the equator at what other longitude?

Answer 123

046˚ W

Question 124

A great circle crosses the equator at 114˚ E. It will also cross the equator at what other longitude?

Answer 124

066˚ W

Question 125

A great circle crosses the equator at 114˚ W. It will also cross the equator at what other longitude?

Answer 125

066˚ E

Question 126

A great circle crosses the equator at 086˚ E. It will also cross the equator at what other longitude?

Answer 126

094˚ W

Question 127

A great circle crosses the equator at 157˚ W. It will also cross the equator at what other longitude?

Answer 127

023˚ E

Question 128

A great circle crosses the equator at 049˚ W. It will also cross the equator at what other longitude?

Answer 128

131˚ E

Question 129

A great circle crosses the equator at 102˚ E. It will also cross the equator at what other longitude?

Answer 129

078˚ W

Question 130

A great circle crosses the equator at 012˚ 35’ E. It will also cross the equator at what other longitude?

Answer 130

167˚ 25’ W

Question 131

A great circle crosses the equator at 032˚ 35’ W. It will also cross the equator at what other longitude?

Answer 131

147˚25’ E

Question 132

A great circle crosses the equator at 078˚ 45’ E. It will also cross the equator at what other longitude?

Answer 132

101˚15’ W

Question 133

A great circle crosses the equator at 120˚ E. It will also cross the equator at what other longitude?

Answer 133

060˚ W

Question 134

A great circle crosses the equator at 120˚ W. It will also cross the equator at what other longitude?

Answer 134

060˚ E

Question 135

The longitude of the upper vertex of a great circle track is 169˚ E. What is the longitude of the lower vertex?

Answer 135

011˚ W

Question 136

The longitude of the upper vertex of a great circle track is 011˚ W. What is the longitude of the lower vertex?

Answer 136

169˚ E

Question 137

The longitude of the upper vertex of a great circle track is 134˚ E. What is the longitude of the lower vertex?

Answer 137

046˚ W

Question 138

The latitude of the upper vertex of a great circle is 36˚ N. What is the latitude of the lower vertex?

Answer 138

36˚ S

Question 139

The latitude of the upper vertex of a great circle is 63˚ N. What is the latitude of the lower vertex?

Answer 139

63˚S

Question 140

The latitude of the upper vertex of a great circle is 27˚ N. What is the latitude of the lower vertex?

Answer 140

27˚S

Question 141

The latitude of the upper vertex of a great circle is 54˚ S. What is the latitude of the lower vertex?

Answer 141

54˚N

Question 142

The latitude of the upper vertex of a great circle is 46˚ S. What is the latitude of the lower vertex?

Answer 142

46˚N

Question 143

The latitude of the upper vertex of a great circle is 30˚ S. What is the latitude of the lower vertex?

Answer 143

30˚N

Question 144

What is the difference of longitude between the intersection of the great circle and the equator to the lower vertex?

Answer 144

90 deg.

Question 145

What is the difference of longitude between the intersection of the great circle and the equator to the upper vertex?

Answer 145

90 deg.

Question 146

The vertex of a great circle track in Long. 109˚ E. An eastbound vessel will cross the equator in what longitude?

Answer 146

161˚ W

Question 147

The vertex of a great circle track is Long. 121˚ E. An eastbound vessel will cross the equator in what longitude?

Answer 147

149˚ W

Question 148

The vertex of a great circle track is Long. 134˚ E. An eastbound vessel will cross the equator in what longitude?

Answer 148

136˚W

Question 149

The vertex of a great circle track is Long. 029˚ E. An eastbound vessel will cross the equator in what longitude?

Answer 149

119˚ E

Question 150

The vertex of a great circle track is Long. 079˚ E. An eastbound vessel will cross the equator in what longitude?

Answer 150

169˚ E

Question 151

The vertex of a great circle track is Long. 029˚ W. An eastbound vessel will cross the equator in what longitude?

Answer 151

061˚ E

Question 152

The vertex of a great circle track is Long. 029˚ W. A westbound vessel will cross the equator in what longitude?

Answer 152

119˚ W

Question 153

The vertex of a great circle track is Long. 134˚ E. A westbound vessel will cross the equator in what longitude?

Answer 153

044˚E

Question 154

The vertex of a great circle track is Long. 109˚ E. A westbound vessel will cross the equator in what longitude?

Answer 154

019˚ E

Question 155

The vertex of a great circle track is Long. 121˚ E. A westbound vessel will cross the equator in what longitude?

Answer 155

031˚ E

Question 156

The vertex of great circle track is Long. 121˚ W. An eastbound vessel will cross the equator in what longitude?

Answer 156

031˚ W

Question 157

The upper vertex of great circle track is at Long. 158˚ W. An eastbound vessel will cross the equator in what longitude?

Answer 157

068˚ W

Question 158

The upper vertex of great circle track is Long. 144˚ W. A westbound vessel will cross the equator in what longitude?

Answer 158

126˚ E

Question 159

The vertex of great circle track is Long. 168˚ W. An eastbound vessel will cross the equator in what longitude?

Answer 159

078˚ W

Question 160

The difference of longitude between the upper vertex and the lower vertex of a great circle is _____.

Answer 160

180 deg.

Question 161

A ship following a great circle track crosses the equator at long. 135˚ 00’ E on course 051.8˚T. If she continues along this great circle track, find the latitude and longitude of the upper vertex.

Answer 161

Lat. 38˚12’ N; Long. 135˚ 00’ W

Question 162

Determine the latitude and longitude of the vertex along your great circle track when going from Lat. 35˚ 17.6’ N; Long.144˚ 23’ E to Lat.47˚ 36’ N; Long. 124˚ 22’ W.

Answer 162

Lat. 52˚47.8’ N; Long. 158˚ 07.3’ W

Question 163

Determine the great circle distance and initial course from Lat 08˚ 36’ N, Long. 126˚ 17’ E to Lat. 02˚12’ S, Long. 081˚ 53’ W.

Answer 163

9076 miles, 079˚T

Question 164

The great circle distance from Lat. 38˚17’ N; Long. 123˚ 16’ W to Lat. 35˚ 01’ N; Long. 142˚ 21’ E is 4330 nautical miles and the initial course is 300.9˚ T Determine the latitude and longitude of the vertex.

Answer 164

Lat. 47˚39.5’ N; Long. 167˚ 18.5’ W

Question 165

You receive a distress call from a vessel reporting her position as Lat. 30˚21’ N; Long. 088˚34’ W. Your position is at Lat. 24˚30’ N; Long. 083˚00’ W. Determine the true course and distance to the distress scene by Mercator Sailing.

Answer 165

320˚ T; dist. 460 nm

Question 166

By Mercator sailing, determine the course and distance when sailing from Lat 43˚08’ N; Long. 005˚56’ E to Lat. 39˚ 29’ N.; Long. 000˚ 24’ W.

Answer 166

233˚T, 361 miles

Question 167

By Mercator sailing, determine the course and distance when sailing from Lat 00˚00’ ; Long. 000˚03’ W to Lat. 51˚ 12’ N.; Long. 016˚ 14’ E.

Answer 167

015˚T, 3185 nm

Question 168

By Mercator sailing, determine the course and distance when sailing from Lat 15˚12’ S; Long. 002˚12’ E to Lat. 28˚ 49’ S.; Long. 017˚ 14’ E.

Answer 168

134˚T, 1171 miles

Question 169

By Mercator sailing, determine the course and distance when sailing from Lat 08˚04’ S; Long. 034˚53’ W to Lat. 14˚ 45’ N.; Long. 017˚ 33’ W.

Answer 169

037˚ T, 1718 miles

Question 170

A vessel at Lat. 38˚ 03’ S, Long. 049˚ 38’ W heads for a destination at Lat, 41˚ 26’ S, Long. 038˚ 32’ W. Determine the true course and distance by Mercator Sailing.

Answer 170

111.5˚

Question 171

A vessel at Lat. 21˚ 18.5’ N, Long. 157˚ 52.2’ W heads for a destination at Lat, 08˚ 53’ N, Long. 079˚ 31’ W. Determine the true course and distance by Mercator Sailing.

Answer 171

099˚ T, 4617.5 miles

Question 172

A vessel steams 1082 miles on course 047˚ T from lat. 37˚18’ N; Long. 024˚ 40’ W. What is the latitude and longitude of the point of arrival by Mercator Sailing.

Answer 172

Lat. 49˚36’ N; Long. 006˚ 28’ W

Question 173

A vessel at Lat. 28˚ 00’ N, Long. 116˚ 00’ W heads for a destination at Lat, 34˚ 00’ N, Long. 123˚ 40’ W. Determine the true course and distance by Middle Latitude Sailing.

Answer 173

312˚ T, 533 miles

Question 174

A vessel at Lat. 20˚ 10’ N, Long. 122˚ 00’ E heads for a destination at Lat, 26˚ 18’ N, Long. 128˚ 20’ E. Determine the true course and distance by Middle Latitude Sailing.

Answer 174

043.5˚ T, 507.3 miles

Question 175

A vessel at Lat. 49˚ 45’ N, Long. 006˚ 35’ W heads for a destination at Lat, 25˚ 50’ N, Long. 077˚ 00’ W. Determine the true course and distance by Mercator or middle latitude Sailing.

Answer 175

246˚ T, 3597 miles

Question 176

A ship sailed on course 326˚T from Latitude 20˚ 58.8’ S, Long. 012˚ 37.6’ E. For a distance of 311 nautical miles. Find the arrival longitude by mercator sailing.

Answer 176

Lat. 16˚41’ N; Long. 009˚ 34.9’ E

Question 177

A ship sails from Lat. 30˚20’ N and steams going south (180) for a distance of 72 miles. What is her arrival latitude?

Answer 177

29˚ 08’ N

Question 178

A ship sails from Lat. 20˚30’ N and steams going south (180) for a distance of 72 miles. What is her arrival latitude?

Answer 178

19˚18’ N

Question 179

A ship sails from Lat. 03˚20’ N and steams going south (180) for a distance of 182 miles. What is her arrival latitude?

Answer 179

00˚18’ N

Question 180

A ship sails from Lat. 30˚20’ S and steams going south (180) for a distance of 180 miles. What is her arrival latitude?

Answer 180

33˚20’ S

Question 181

A ship sails from Lat. 46˚22’ S and steams going south (180) for a distance of 372 miles. What is her arrival latitude?

Answer 181

52˚34’ S

Question 182

A ship sails from Lat. 52˚34’ S and steams going north (000) for a distance of 372 miles. What is her arrival latitude?

Answer 182

46˚22’ S

Question 183

A ship sails from Lat. 52˚34’’ S and steams going south (180) for a distance of 372 miles. What is her arrival latitude?

Answer 183

58˚46’ S

Question 184

A ship sails from Lat. 34˚54’ N and steams going south (180) for a distance of 372 miles. What is her arrival latitude?

Answer 184

28˚42’ N

Question 185

A ship sails from Lat. 34˚54’ N and steams going north (000) for a distance of 372 miles. What is her arrival latitude?

Answer 185

41˚06’ N

Question 186

A ship sails from Lat. 46˚22’ N and steams going south (180) for a distance of 372 miles. What is her arrival latitude?

Answer 186

40˚10’ N

Question 187

At 1210 LZT, on 01 December 2007, you depart Seattle at Lat. 47˚ 36’ N; Long. 122˚ 22’ W (ZD+8). You are bound for Guam, Lat 13˚ 27’ N; Long. 144˚ 37’ E and you estimate your speed of advance at 20 knots. The distance is 4,948 miles. What is your estimated zone time of arrival in Guam?

Answer 187

1334, 12 December

Question 188

At 0915 LZT, on 07 November 2007, you depart Seattle at Lat. 47˚ 36’ N; Long. 122˚ 22’ W (ZD+8). You are bound for Kobe, Lat 34˚ 40’ N; Long. 135˚ 12’ E and you estimate your speed of advance at 18.5 knots. The distance is 4,527 miles. What is your estimated zone time of arrival at Kobe?

Answer 188

0657, 18 November

Question 189

At 1820 LZT, on 21 March 2007, you depart San Francisco at Lat. 37˚ 48.5’ N; Long. 122˚ 24’ W (ZD+8). You are bound for Melbourne, Lat 37˚ 49.2’ S; Long. 144˚ 56’ E and you estimate your speed of advance at 21 knots. The distance is 6,970 miles. What is your estimated zone time of arrival at Melbourne?

Answer 189

0814, 05 April

Question 190

At 0915 LZT, on 26 July 2007, you depart Yokohama at Lat. 37˚ 27’ N; Long. 139˚ 39’ E (ZD-9). You are bound for Seattle, Lat 47˚ 36’ N; Long. 122˚ 22’ W and you estimate your speed of advance at 14 knots. The distance is 4,245 miles. What is your estimated zone time of arrival at Seattle?

Answer 190

0728, 07 August

Question 191

At 0600 LZT, on 22 October 2007, you depart Manila at Lat. 14˚ 35’ N; Long. 120˚ 58’ E (ZD-8). You are bound for Los Angeles, Lat 33˚ 46’ N; Long. 118˚ 11’ W and you estimate your speed of advance at 20.2 knots. The distance is 6385.9 miles. What is your estimated zone time of arrival at Los angeles?

Answer 191

1808, 03 November

Question 192

At 0530 LZT, on 20 December 2007, you depart Capetown, South Africa (ZD-1). You are bound for New York (ZD +5), and you estimate your speed of advance at 25 knots. The distance is 6762 miles. What is your estimated zone time of arrival at New York?

Answer 192

0600, 31 December

Question 193

Your ship will sail from a position in LAT 08˚51’N; LONG. 081˚31’ W to position at LAT 33˚ 51.5’ S; LONG 151˚13’ E. The distance by great circle is 7635 miles, and you estimate an average speed of 15 knots. Find your estimated zone time of arrival if you depart at 1510 ZT on July 23?

Answer 193

1110, 14 August

Question 194

You are on a voyage from New York, USA, to San Francisco, USA. The distance from pilot to pilot is 5132 miles. The speed of advance is 13.5 knots. You estimate 32 hours for bunkering at Colon, and 14 hours for the Panama Canal Transit. If you take departure at 0600 hours (ZD+4) on 16 May, what is your ETA (ZD+7) at San Francisco?

Answer 194

2109, 02 June

Question 195

You are on a voyage from Limoy, Costa Rica, to Los angeles, USA. The distance from pilot to pilot is 3150 miles. The speed of advance is 14 knots. You estimate 24 hours for bunkering at Colon, and 12 hours for the Panama Canal Transit. If you take departure at 1836 hours (ZD+6) on 28 January, find your ETA (ZD+8) at Los angeles?

Answer 195

1336, 08 February

Question 196

You are on a voyage from Baltimore,Mainland USA, to Seattle, Washington, USA. The distance from pilot to pilot is 5960 miles. The speed of advance is 16 knots. You estimate 16 hours for bunkering at Colon, and 12 hours for the Panama Canal Transit. If you take departure at 0824 hours (ZD+5), 18 November, find ETA (ZD+8) at Seattle?

Answer 196

2154, 04 December

Question 197

You are on a voyage from Halifax, Nova Scotia, to Galveston, TX. The distance from pilot to pilot is 2138 miles. The speed of advance is 12.5 knots. You estimate 18 hours for bunkering enroute at Port Everglades, FL. If you sail at 0648 hours (ZD+4), on, on June 12, what is your ETA (ZD+5) at Galveston?

Answer 197

0250, 20 June

Question 198

You are on a voyage from Valdez, Alaska, to the Panama Canal. The distance from pilot to pilot is 4950 miles. The speed of advance is 15 knots. You estimate a layover at San Francisco, CA of 36 hours If you take departure at 0800 hours (ZD+10), on 29 October, what is your ETA (ZD+5) at Panama Canal?

Answer 198

1900, 13 November

Question 199

You are on a voyage from Belem. Brazil, to Mobile, Alabama. The distance from pilot to pilot is 3150 miles. The speed of advance is 14 knots. You estimate a layover at San Juan, Puerto Rico of 17.5 hours If you take departure at 2200 hours (ZD+3h 30m), on 26 February 2007, what is your ETA (ZD+6) at Mobile?

Answer 199

2200, 08 March

Question 200

At 0915 zone time, on 06 March, you depart Sydney, Australia in LAT. 33˚ 51.5’ S; LONG. 151˚ 13.0’ E (ZD-10). You are bound for Kodiak, LAT. 57˚ 47’ N; LONG. 152˚ 25.0’ W. If you estimate your speed of advance to be 21 knots and the distance is 6,222 miles. What is your ETA at Kodiak?

Answer 200

2132, 17 March

Question 201

You are on a voyage from San Diego, CA, to New York, USA. The distance from pilot to pilot is 4860 miles. The speed of advance is 15 knots. You estimate 18 hours for bunkering at Colon, and 14 hours for the Panama Canal Transit. If you take departure at 0836 hours (ZD+7), 4 July, what is your ETA (ZD+4) at New York?

Answer 201

0736, 19 July

Question 202

At 0800 zone time, on 15 April, your vessel is heading west in position LAT.15˚ 10’ N; LONG. 165˚15’ W at a speed of 22 knots. The distance to your destination at LAT. 15˚ 10’ N; LONG. 135˚ 15’ E is 3600 nautical miles. What is your ETA ?

Answer 202

2339, 22 April

Question 203

On Novemeber 21 at 2100 zone time,you depart Pt. A (ZD+5) enroute to Pt. B (ZD+1). The total distance is 3519 nautical miles. What will be the speed to use in order to arrive at Pt. B on December 3 at 1830 zone time?

Answer 203

12.5 knots

Question 204

On September 13 at 1936 hours, your ship was in Lat. 21˚32’ N; Long. 070˚ 18’ W. On Sept. 14 at 1854 hours, your ship was in Lat. 018˚ 15’ N; Long. 065˚ 24’ W. What is your speed if your total distance run is 341 nautical miles?

Answer 204

15.3 knots

Question 205

You are departing San Francisco, California (ZD+8) on Oct. 10 at 1200 LZT bound for Yokohama, japan (ZD+9) with a total distance of 4536 miles. What will be your approximate speed if you plan to arrive Yokohama on Oct. 19 at about 1900 LZT?

Answer 205

22.0 knots

Question 206

The GMT is 0445 hours and your zone description is +1, your local zone time is _____.

Answer 206

345 hours

Question 207

You are at longitude 124˚00’ E and your local mean time is 0520H on the 5th of the month. What is the mean time at Greenwich?

Answer 207

2104H on the 4th

Question 208

The LMT of sunrise as tabulated in the Nautical Almanac indicates 05h 52 min. You are at Longitude 099˚ 15’E. What will be the LZT of sunrise?

Answer 208

0615H

Question 209

The LMT of sunrise as tabulated in the Nautical Almanac indicates 05h 52 min. You are at Longitude 099˚ 15’W. What will be the LZT of sunrise?

Answer 209

0529H

Question 210

The LMT of sunrise as tabulated in the Nautical Almanac indicates 05h 52 min. You are at Longitude 090˚ 00’E. What will be the LZT of sunrise?

Answer 210

0552H

Question 211

The LMT of sunrise as tabulated in the Nautical Almanac indicates 05h 52 min. You are at Longitude 099˚ 15’E. What will be the GMT of sunrise?

Answer 211

2315H

Question 212

The LMT of sunrise as tabulated in the Nautical Almanac indicates 05h 52 min. You are at Longitude 099˚ 15’W. What will be the GMT of sunrise?

Answer 212

1229H

Question 213

The LMT of sunrise as tabulated in the Nautical Almanac indicates 05h 52 min. You are at Longitude 120˚ 00’E. What will be the LZT of sunrise?

Answer 213

0552H

Question 214

The LMT of sunrise as tabulated in the Nautical Almanac indicates 05h 52 min. You are at Longitude 124˚ 00’ E. What will be the LZT of sunrise?

Answer 214

0536H

Question 215

The LMT of sunrise as tabulated in the Nautical Almanac indicates 05h 52 min. You are at Longitude 116˚ 00’ E. What will be the LZT of sunrise?

Answer 215

0608H

Question 216

The LMT of sunrise as tabulated in the Nautical Almanac indicates 06h 00 min. You are at Longitude 116˚ 00’ E. What will be the LZT of sunrise?

Answer 216

0616H

Question 217

The LMT of sunrise as tabulated in the Nautical Almanac indicates 06h 00 min. You are at Longitude 124˚ 00’ E. What will be the LZT of sunrise?

Answer 217

0544H

Question 218

The LMT of sunrise as tabulated in the Nautical Almanac indicates 05h 52 min. You are at Longitude 120˚ 00’W. What will be the LZT of sunrise?

Answer 218

0552H

Question 219

The LMT of sunrise as tabulated in the Nautical Almanac indicates 05h 52 min. You are at Longitude 116˚ 00’W. What will be the LZT of sunrise?

Answer 219

0536H

Question 220

The LMT of sunrise as tabulated in the Nautical Almanac indicates 05h 52 min. You are at Longitude 124˚ 00’W. What will be the LZT of sunrise?

Answer 220

0608H

Question 221

The LMT of sunrise as tabulated in the Nautical Almanac indicates 05h 52 min. You are at Longitude 075˚ 00’W. What will be the LZT of sunrise?

Answer 221

0552H

Question 222

The LMT of sunrise is 04h 30min. At LAT. 48˚55’ N. LONG. 078˚ 18’ W. Find the GMT of sunrise.

Answer 222

9h 43m 12s

Question 223

The equation of time is12m 00s and the mean sun is ahead of the apparent sun. If you are in the central meridian of your time zone, at what zone time will the apparent sun cross the meridian?

Answer 223

1212H

Question 224

The equation of time is12m 00s and the apparent sun is ahead of the mean sun. If you are in the central meridian of your time zone, at what zone time will the apparent sun cross the meridian?

Answer 224

1148H

Question 225

The equation of time is16m 00s and the apparent sun is ahead of the mean sun. If you are in the central meridian of your time zone, at what zone time will the apparent sun cross the meridian?

Answer 225

1144H

Question 226

The equation of time is16m 00s and the mean sun is ahead of the apparent sun. If you are in the central meridian of your time zone, at what zone time will the apparent sun cross the meridian?

Answer 226

1216H

Question 227

The LMT of meridian passage taken from the nautical almanac indicates 1210H. You are at longitude 070˚ 30’ E. What time would you use to enter in the nautical almanac to determine the declination of the sun at local apparent noon (LAN)?

Answer 227

0728H

Question 228

What is the geographical latitude of a body whose declination is 23˚27’ N?

Answer 228

23˚ 27’N

Question 229

What is the geographical latitude of star “Deneb” whose declination is 45˚16’ N?

Answer 229

45˚ 16’ N

Question 230

What is the geographical latitude of star “Rigel” whose declination is 08˚ 12’ S?

Answer 230

08˚ 12’ S

Question 231

What is the geographical latitude of a body whose declination is 66˚33’ S?

Answer 231

66˚ 33’S

Question 232

What is the geographical longitude of a body whose GHA is 127˚ 33’ ?

Answer 232

127˚ 33’ W

Question 233

What is the geographical longitude of a body whose GHA is 149˚30’ ?

Answer 233

149˚ 30’ W

Question 234

What is the geographical longitude of a body whose GHA is 232˚27’ ?

Answer 234

127’ 33’ E

Question 235

What is the geographical longitude of a body whose GHA is 210˚ 30’ ?

Answer 235

149˚ 30’ E

Question 236

What is the geographical longitude of a body whose GHA is 279˚30’ ?

Answer 236

080˚ 30’ E

Question 237

The GP of a celestial body is Lat. 20˚ 36’ S and Long. 074˚ 10’ E. Find its GHA and declination on the celestial sphere.

Answer 237

GHA = 285˚ 50’ Dec. = 20˚ 36’ S

Question 238

The GP of a celestial body is Lat. 15˚ 40’ S and Long. 074˚ 10’ W. Find its GHA and declination on the celestial sphere.

Answer 238

GHA = 074˚ 10’ Dec. = 15˚ 40’ S

Question 239

The GP of a celestial body is Lat. 45˚ 00’ N and Long. 090˚ 00’ E. Find its GHA and declination on the celestial sphere.

Answer 239

GHA = 270˚ 00’ Dec. = 45˚’00’ N

Question 240

The GP of a celestial body is Lat. 23˚ 27’ N and Long. 114˚ 20’ W. Find its GHA and declination on the celestial sphere.

Answer 240

GHA = 114˚ 20’ Dec. = 23˚’27’ N

Question 241

A ship steaming on a course of 246˚ T at 17 knots. At 2107 a lighthouse was observed bearing 207 deg T and at 2119 the same lighthouse bears 179˚ T. What is the ship’s distance off at second bearing?

Answer 241

4.6 miles

Question 242

A ship is steaming a course of 090˚ T at a speed of 14 knots. At 1841H you observed a lighthouse bearing 053 deg.T and at 1904H, the same lighthouse bears 031˚ T. What is the distance to the lighthouse when abeam?

Answer 242

7.4 miles

Question 243

Aship is steaming a course of 090˚ T at a speed of 14 knots. At 1841, you observed a lighthouse bearing 053 deg.T and at 1904, the same lighthouse bears 031˚ T. What will be the time when the lighthouse is abeam of your vessel?

Answer 243

1923

Question 244

You are steaming on course 090˚T at 14 knots when a lighthouse was observed bearing 053˚ T at 1841. The same lighthouse bears 031˚T at 1904. What is the distance off the lighthouse at second bearing?

Answer 244

8.6 miles

Question 245

A ship is on course 253˚ T at 14 knots. At 2329 a lighthouse was observed bearing 282˚ T At 2345 the same lighthouse bears 300 deg.T Find the ship’s distance off at second bearing?

Answer 245

5.9 miles

Question 246

You are steering 078˚ T, and a light was seen dead ahead at a distance of 15.6 miles at 2316 you change course to pass the light abeam to port at a distance of 4.5 miles. If you are making 17 knots, what is the time when abeam of the light?

Answer 246

0009H

Question 247

You are steering 031˚ T, and a light was seen dead ahead at a distance of 12.7 miles at 0017H you change course to pass the light abeam to starboard at a distance of 3.5 miles. If you are making 11 knots, what is the time when abeam of the light?

Answer 247

0124H

Question 248

You are steering 173˚T and a light was picked up dead ahead at a distance of 13.9 miles at 0054. You change course to pass the light 4.5 miles off abeam to port. If you making 21 knots, what will be the time when abeam of the light?

Answer 248

0131H

Question 249

You are steering 163˚ T and a light was picked up dead ahead at a distance of 11 miles at 0142. You change course to pass the light 2 miles off abeam to starboard. If you making 13 knots, what will be the time when abeam of the light?

Answer 249

0232H

Question 250

A vessel was steaming on a course 168˚ T at a speed of 18 knots. At 1426H a buoy was sighted bearing 144˚ T . At 1434 another bearing of the buoy was taken at 116˚ T. What is the distance off the second bearing and the predicted distance when abeam?

Answer 250

2.0 miles,2nd bearing; 1.8 miles abeam

Question 251

You desire to make good a true course of 067˚T.The variation is 11˚ West, the magnetic compass deviation is 3˚ East and the gyro error is 1˚ West. A northwesterly wind produces a 5 degree leeway. What should be the course to steer per standard compass to make good the true course?

Answer 251

070 psc

Question 252

You desire to make good a true course of 129˚T. The variation is 7˚ East, magnetic compass deviation is 4˚ East and the gyro error is 2˚ West. An easterly wind produces a 4 degree leeway. What should be the course to steer per magnetic compass in order to make good the true course?

Answer 252

114 psc

Question 253

The True course between two points is 023˚T The gyro error is 1˚West and you make an allowance of 4 degree leeway for an East wind. What gyro course should be steered in order to make the True course good?

Answer 253

026 pgc

Question 254

The True course between two points is 041˚T. The gyro has an error of 1˚ West. You make an allowance of 2 degree leeway for an east-southeast wind. What gyro course should be steered to make the True course good?

Answer 254

044 pgc

Question 255

Your vessel is steering a course of 027˚ psc. The variation for the locality is 19˚ West and the deviation of the compass is 2˚ East. The wind is from the North-northwest, producing a 5 degree Leeway. What True course are you making good?

Answer 255

015 T

Question 256

A ship was on course 253˚ T at 14 knots. At 2329 a lighthouse was observed bearing 282˚ T At 2345, the lighthouse bears 300˚ T. What is the ship’s distance off the second bearing and distance when abeam?

Answer 256

5.9 mi./ 4.3 mi.

Question 257

You are steering 019˚T, and a light was picked up dead ahead at a distance of 11.6 miles at 0216H. You change course to pass the light 3 miles off abeam to port. If you are making 14 knots, what is your ETA at the position 3 miles off the light?

Answer 257

0304H

Question 258

You are steering 231˚ T, and a light is picked up dead ahead at a distance of 12.3 miles at 0338H. You then change course to pass the light 4 miles off abeam to starboard. If you are making 16.5 knots, what is your ETA at the position 4 miles off the light?

Answer 258

0420H

Question 259

You are steering 287˚T and a light was picked up dead ahead at a distance of 19.4 miles at 0419H. You change course to pass the light 4 miles off abeam to starboard. If you are making 13 knots, what is your ETA at the position 4 miles off the light?

Answer 259

0547H

Question 260

You are steering 115˚ T, and a light was picked up dead ahead at a distance of 16.7 miles at 0522. You change course to pass the light 3.5 miles off abeam to port. If you are making 12 knots, what is your ETA at the position 3.5 miles off the light?

Answer 260

0644H

Question 261

Your ship is sailing at 20 knots on course 160˚T. At 1840 hours you observe a lighthouse bearing 205˚ T. At 1908 hours, the light bears 250˚ T. What is your distance off the lighthouse at the second bearing?

Answer 261

9.3 miles

Question 262

Your ship is sailing on course 250˚ T at 20 knots. At 1418 hours you observe a lighthouse bearing 205˚T At 1446 hours, the same lighthouse bears 160˚ T. At what distance off will your vessel be abeam of the light?

Answer 262

9.3 miles

Question 263

Your vessel is on course of 343˚T at 14 knots. At 2156H a light bears 320.5˚T and at 2217H the same light bears 298˚T. At what time and at what distance off will your vessel be abeam of the light?

Answer 263

2232H, 3.4 miles

Question 264

Your vessel is proceeding down a channel and you see a pair of range lights that are in line ahead. The chart indicates that the direction of this pair of lights is 229˚T and the variation is 6˚ West. If the heading of your vessel at the time of the sighting is 232˚ psc, what is the correct deviation?

Answer 264

3 deg. East

Question 265

While proceeding up a channel on a course of 350˚ pgc you took a bearing on a pair of range lights and got a bearing of 355˚ pgc. The true bearing on the nautical chart is indicated as 357˚T. The variation for the locality is 22˚ West. The ship’s course psc is 015˚. The deviation on the present heading is ______.

Answer 265

1 deg. West

Question 266

Your vessel is steering a course of 216˚ psc. Variation for the area is 9˚ West and the deviation is 2˚ East. The wind is from East producing a 5˚ leeway. What true course are you making good?

Answer 266

214 deg True

Question 267

Your vessel is steering a course of 197˚ psc, variation for the area is 7˚ East and the deviation is 4˚ West. The wind is from the West producing a two-degree leeway. What true course are you making good?

Answer 267

198 deg True

Question 268

You desire to make good a true course of 203˚ T. The variation is 19˚ East, the magnetic compass deviation is 2˚ West and the gyro compass error is 1˚ East. What should be the compass course to steer per standard magnetic compass to make the true course good?

Answer 268

189 psc

Question 269

You desire to make good a true course of 007˚ True. The variation is 5˚ East, deviation is 3˚ West and the gyro compass error is 2˚ East. A Southwest by west wind produces a 2 degree leeway. What is the course to steer per standard magnetic compass to make the true course good?

Answer 269

003 deg psc

Question 270

Your vessel is proceeding up a channel and you see a pair of range lights that are in line ahead. The chart indicates that the direction of this pair of lights is 212˚ T and the variation is 7˚ West. If the heading of your vessel at the time of of the sighting 208˚ per standard magnetic compass, what is the correct deviation?

Answer 270

11 deg. East

Question 271

Your vessel is proceeding up a channel and you see a pair of range lights that are in line ahead. The chart indicates that the direction of this pair of lights is 014˚ T and the variation is 11˚ East. If the heading of your vessel at the time of sighting is 009˚ per standard magnetic compass, what is the correct deviation?

Answer 271

6 deg. West

Question 272

Your vessel is proceeding up a channel and you see a pair of range lights that are in line ahead. The nautical chart indicates that the direction of this pair of lights is 343˚ T and the variation is 5˚ West. IF the heading of your vessel at the time of sighting is 344˚ per standard magnetic compass, what isthe correct deviation?

Answer 272

4 deg. East

Question 273

While your vessel is proceeding down a channel you notice a range of lights in line with your vessel’s mast. If your vessel is on course 001˚ per gyro compass and the charted value of the range lights is 359˚ True, find your gyro compass error.

Answer 273

2 deg. West

Question 274

The true course between two waypoints is 078˚ Your gyrocompass has an error of 2˚ East and you make anallowance of 3 degree leeway for a North wind. You are at present on auto pilot. What gyro course should be set on your gyro pilot in order to make good the true course?

Answer 274

073 pgc

Question 275

The true course between two waypoints is 312˚T. Your gyrocompass has an error of 3˚ West and you make an allowance of 4 degree leeway for a west by south wind. At present you are on auto-pilot. What gyro course should be set on your gyro pilot to make the true course good?

Answer 275

311 pgc

Question 276

A true course of 041˚ between two waypoints is plotted on the nautical chart. At that moment the wind is blowing from East-southeast which would require you to make an allowance of 2˚ to compensate the effect of the wind. Your gyro compass has an error of 1˚W. What gyro course should be steered to make the true course good?

Answer 276

044 pgc

Question 277

The course line plotted on the chart indicates that the true course between the 2 waypoints is 119 deg.T. Your gyro compass has an error of 3 deg. East and you have to make an allowance of 4 deg. leeway for a south-southwest wind. What gyro course should be steered to make the true course good?

Answer 277

120 pgc

Question 278

While proceeding up a channel on a course of 010˚ per gyro compass you notice a pair of range lights in alignment with the masts of your vessel when viewed forward. A check on the chart shows the range to be 009˚ T and the variation on the compass rose to be 15˚W. If the ship’s course is 026˚ psc, what is the deviation on the present heading?

Answer 278

2 deg. West

Question 279

Your ship is entering a channel on a magnetic course of 265˚ with two beacons in range. The true range bearing as taken from the chart is 264˚. If the variation in the locality is 1˚ East, what is the deviation of the magnetic compass?

Answer 279

2 deg. West

Question 280

What is the true bearing of the peak to be plotted as a line of position (LOP) on the chart when the compass bearing of the peak is 336˚ with a variation of 1˚ East and the deviation is 5˚ West?

Answer 280

332 deg.T

Question 281

The compass bearing of a mountain peak was taken as 336˚. The variation is 15˚ West and the deviation is 9˚ West. The true bearing of the peak as plotted on the chart is:

Answer 281

312 deg T

Question 282

What is the deviation of the compass on heading 053˚ T when steering 044 per steering compass to a beacon in range dead ahead with variation in the locality of 4 deg. W?

Answer 282

13 deg.East

Question 283

You have just taken a satellite fix on your ship and from there the Master traced a new course line on the chart which is 130˚ True. The variation for the locality is 10˚ West and the deviation is 6˚ East. Find compass error and then solve for the compass course to steer.

Answer 283

C/E = 4 deg.West Compass Co. = 134 psc

Question 284

A ship is on course 250˚ psc, deviation is 18˚ East, variation of the locality is 7˚ East. Find the compass error and the true course.

Answer 284

C/E = 25 deg. East True co. = 275 T

Question 285

A ship is on course 241˚ psc and 251˚ pgc, when you noticed a range in line bearing 192˚ by gyro. The chart indicates that the range is in line on 194˚ T. The variation of the locality is 16˚ East. What is the deviation of the magnetic compass?

Answer 285

4 deg. W

Question 286

Your vessel is steering a course of 216˚ psc. Variation for the area is 9˚ West and the deviation is 2˚ East. The wind is from East producing a 5˚ leeway . What is the true course made good (TCMG)?

Answer 286

214 deg.T

Question 287

Find the compass course to steer(CCTS) on a True course of 225˚ T. Leeway due to a Southerly wind is 10 degrees. The Variation on the locality is 5˚ East, deviation of the compass is 4˚ East.

Answer 287

206 deg. Psc

Question 288

You are enroute to assist vessel B. Vessel B is underway at 5 knots on course 063˚ T and bears 136˚T at 78 miles away from you. What is the course to steer at 13 knots to intercept vessel B?

Answer 288

114 deg. T

Question 289

You are enroute to assist vessel B. Vessel B is underway at 4.5 knots on course 233˚ T and bears 264˚ T at 68 miles away from you. What is the course to steer at 13 knots to intercept vessel B?

Answer 289

256 deg.T

Question 290

You are enroute to assist vessel A. Vessel A is underway at 5.5 knots on course 033˚ T and bears 248˚ T at 64 miles from you. What is the course to steer at 13 knots to intercept vessel A?

Answer 290

262 deg.T

Question 291

You are enroute to assist vessel A. Vessel A is underway at 5.5 knots on course 033˚ T and bears 284˚ T at 43 miles from you. What is the course to steer at 16 knots to intercept vessel A?

Answer 291

303 deg.T

Question 292

You are enroute to assist vessel A. Vessel A is underway at 4.5 knots on course 233˚ T and bears 346˚ T at 68 miles from you. What is the course to steer at 13 knots to intercept vessel A?

Answer 292

328 deg.T

Question 293

The position obstained from one point relative to another, without considering the distance between them is called _______.

Answer 293

Direction

Question 294

Course is the direction of movement of the observer while the direction of an object from the observer is called ______.

Answer 294

Bearing

Question 295

The direction of an object from the observer is known as bearing while the direction of movement of the observer is called _____.

Answer 295

Course

Question 296

The bearing relative to the heading of a vessel which is expressed as the angular difference between heading and the direction is called ______.

Answer 296

Relative Bearing

Question 297

The direction in which a vessel is steered is called the course while the path that is actually followed by the vessel is called the ______.

Answer 297

Course over ground

Question 298

You are course 027˚T and took a relative bearing of a lighthouse and found to be 220˚. What is the True bearing of the lighthouse?

Answer 298

247 deg.T

Question 299

You are on course 344˚ T and took a relative bearing of a lighthouse of 270˚. What is the True bearing of the lighthouse?

Answer 299

254 deg.T

Question 300

You are on course 277˚ T and took a bearing of a lighthouse of 045˚ R. What is the True bearing of the lighthouse?

Answer 300

322 deg.T

Question 301

What is the relative bearing of an object broad on port quarter?

Answer 301

225 deg

Question 302

What is the relative bearing of an object that is broad on starboard bow?

Answer 302

045 deg

Question 303

If you take a bearing of 176˚ to a lighthouse, what other bearing of another conspicuous object would give the best fix?

Answer 303

079 deg

Question 304

If you take a bearing of 264˚ to a lighthouse, what other bearing of another conspicuous object would give the best fix?

Answer 304

350 deg

Question 305

If you take a bearing of 356˚ to a lighthouse, what other bearing of another prominent object would give the best fix?

Answer 305

082 deg.

Question 306

What is the relative bearing of an object which is two points abaft the starboard beam?

Answer 306

112.5 deg.

Question 307

What is the relative bearing of an object which is two points abaft the port beam?

Answer 307

247.5 deg

Question 308

What is the relative bearing of an object located dead astern?

Answer 308

180 deg

Question 309

If you take a bearing of 191˚ and 313˚ to two prominent objects, what bearing of a third object will provide the best fix?

Answer 309

069 deg

Question 310

If you take a bearing of 142˚ and 259˚ to two prominent objects on shore, what bearing of a third object will provide the best fix?

Answer 310

201 deg

Question 311

If you take a bearing of 313˚ and 076˚ of two prominent objects, what bearing of a third object will provide the best fix?

Answer 311

014 deg.

Question 312

You are taking bearings on two known objects on shore. The best fix is ontained when the angle between the lines of position is:

Answer 312

90 deg

Question 313

If you take a bearing of 086˚ to a lighthouse, what other bearing of another prominent object would give the best fix?

Answer 313

000 deg

Question 314

If you take a bearing of 176˚ to a lighthouse, what other bearing of another prominent object would give the best fix?

Answer 314

079 deg

Question 315

If you take a bearing of 264˚ to a lighthouse, what other bearing of another prominent object would give the best fix?

Answer 315

350 deg

Question 316

If you take a bearing of 356˚ to a lighthouse, what other bearing of another fixed object on shore would give the best fix?

Answer 316

082 deg.

Question 317

If you take a bearing of 043˚ and 169˚ to two prominent objects ashore, what bearing of a third object will provide the best fix?

Answer 317

102 deg

Question 318

If you take a bearing of 135˚ to a prominent object, which other bearing of another object will NOT provide the best fix?

Answer 318

315 deg

Question 319

If you take a bearing of 225˚ to a prominent object on shore, which other bearing of another prominent object will NOT provide the best fix?

Answer 319

045 deg

Question 320

If you take a bearing of 045˚ to a prominent object on shore, which other bearing of another prominent object will NOT provide the best fix?

Answer 320

225 deg

Question 321

If you take a bearing of 315˚ to a conspicuous object on land, which other bearing of another object will NOT provide the best fix?

Answer 321

135 deg

Question 322

If you take a bearing of 249˚ to a fixed known object on shore, which other bearing will NOT give a good fix?

Answer 322

069 deg

Question 323

If you take a bearing of 086˚ to a lighthouse, which other bearing of another prominent object will NOT give a good fix?

Answer 323

266 deg

Question 324

If you take a bearing of 176˚ to a lighthouse, which other bearing of another prominent object will NOT give a good fix?

Answer 324

356 deg

Question 325

If you take a bearing of 191˚ to a prominent object ashore, which bearing of another object will NOT provide a good fix?

Answer 325

011 deg

Question 326

If you take a bearing of 264˚ to a lighthouse, which other bearing of another prominent object will NOT produce a good fix?

Answer 326

084 deg

Question 327

If you take a bearing of 142˚ to a lighthouse, which other bearing of another lighthouse will NOT produce a good fix?

Answer 327

322 deg

Question 328

If you take abearing of 259˚ to a fixed known object on shore, which of the following bearings of other objects will NOT produce a good fix?

Answer 328

079 deg

Question 329

If you take a bearing of 322˚ to a fixed charted object on shore, which of the following bearing of another object will NOT provide a good fix?

Answer 329

142 deg

Question 330

If you take a bearing of 145˚ to a fixed charted object on shore, which of the following bearing of another object will NOT provide a good fix?

Answer 330

325 deg

Question 331

Which of the following bearings of two prominent objects when taken simultaneously will provide a good fix?

Answer 331

144 deg and 236 deg

Question 332

Which of the following bearings of two fixed objects on shore when taken simultaneously will provide a good fix?

Answer 332

228 deg and 136 deg

Question 333

Which of the following bearings of two lighthouses when taken simultaneously will provide a good fix?

Answer 333

184 deg and 275 deg

Question 334

Which of the following bearings of two fixed and charted objects will provide a good fix when taken at nearly the same time?

Answer 334

119 deg and 207 deg

Question 335

Which of the following bearings of two fixed and charted objects will provide a good fix when taken at nearly the same time?

Answer 335

131 deg and 040 deg

Question 336

Which of the following bearings of two fixed and charted objects will give a good crossing angle between 2 LOPs if taken at nearly the same time?

Answer 336

136 deg and 228 deg

Question 337

Which of the following bearings of two fixed and charted objects will give a good crossing angle between 2 LOPs if taken at nearly the same time?

Answer 337

275 deg and 184 deg

Question 338

Which of the following bearings of two fixed and charted objects will give a good crossing angle between 2 LOPs if taken at nearly the same time?

Answer 338

207 deg and 119 deg

Question 339

Which of the following bearings of two fixed and charted objects will give a good crossing angle between 2 LOPs if taken at nearly the same time?

Answer 339

040 deg and 131 deg

Question 340

Which of the following bearings of two fixed and charted objects will give a good crossing angle between 2 LOPs if taken at nearly the same time?

Answer 340

128 deg and 218 deg

Question 341

Which of the following bearings of two fixed and charted objects will give a good crossing angle between 2 LOPs if taken at nearly the same time?

Answer 341

345 deg and 280 deg

Question 342

Which of the following bearings of two fixed and charted objects will give a good crossing angle between 2 LOPs if taken at nearly the same time?

Answer 342

209 deg and 285 deg

Question 343

Which of the following bearings of two fixed and charted objects will give a good crossing angle between 2 LOPs if taken at nearly the same time?

Answer 343

023 deg and 102 deg

Question 344

Which of the following bearings of two fixed and charted objects will give a good crossing angle between 2 LOPs if taken at nearly the same time?

Answer 344

120 deg and 042 deg

Question 345

Which of the following bearings of two fixed and charted objects will give a good crossing angle between 2 LOPs if taken at nearly the same time?

Answer 345

005 deg and 056 deg

Question 346

Which of the following bearings of two fixed and charted objects will give a good crossing angle between 2 LOPs if taken at nearly the same time?

Answer 346

313 deg and 076 deg

Question 347

Which of the following bearings of two fixed and charted objects will give a good crossing angle between 2 LOPs if taken at nearly the same time?

Answer 347

142 deg and 259 deg

Question 348

Which of the following bearings of two fixed and charted objects will give a good crossing angle between 2 LOPs if taken at nearly the same time?

Answer 348

169 deg and 048 deg

Question 349

A vessel is following a range to keep herself within a narrow channel. The chart indicates the range to be 321˚. The vessel is “on range” when she is steering a course of ______.

Answer 349

321 deg.T

Question 350

A vessel is following a range to keep herself within a narrow channel. The chart indicates the range to be 108˚. The vessel is “on range” when she is steering a course of ______.

Answer 350

108 deg.T

Question 351

A vessel is following a range to keep herself within a narrow channel. The chart indicates the range to be 243˚. The vessel is “on range” when she is steering a course of ______.

Answer 351

243 deg.T

Question 352

A vessel is following a range to keep herself within a narrow channel. The chart indicates the range to be 041˚. The vessel is “on range” when she is steering a course of ______.

Answer 352

041 deg.T

Question 353

A vessel is following a range to keep herself within a narrow channel. The chart indicates the range to be 287˚. The vessel is “on range” when she is steering a course of ______.

Answer 353

287 deg.T

Question 354

A vessel is following a range to keep herself within a narrow channel. The chart indicates the range to be 001˚. The vessel is “on range” when she is steering a course of ______.

Answer 354

001 deg.T

Question 355

A vessel is following a range to keep herself within a narrow channel. The chart indicates the range to be 154˚. The vessel is “on range” when she is steering a course of ______.

Answer 355

154 deg.T

Question 356

A vessel is following a range to keep herself within a narrow channel. The chart indicates the range to be 256˚. The vessel is “on range” when she is steering a course of ______.

Answer 356

256 deg.T

Question 357

Your vessel is making way through the water at a speed of 12 knots. Your vessel traveled 30 nautical miles in 2 hours 20 minutes. What current are you experiencing?

Answer 357

A following current of 0.9 knot

Question 358

Your vessel is making way through the water at a speed of 12 knots. Your vessel traveled 30 nautical miles in 2 hours 15 minutes. What current are you experiencing?

Answer 358

A following current of 1.3 knots

Question 359

Course is the direction of movement of the observer while the direction of a current from the observer is called ______.

Answer 359

set

Question 360

Your vessel is making way through the water at a speed of 12 knots. Your vessel traveled 30 nautical miles in 2 hours 30 minutes. What current are you experiencing?

Answer 360

slack

Question 361

Your vessel is making way through the water at a speed of 10 knots. Your vessel traveled 30 nautical miles in 2 hours 30 minutes. What current are you experiencing?

Answer 361

A following current of 2.0 knots

Question 362

Your vessel is making way through the water at a speed of 14 knots. Your vessel traveled 30 nautical miles in 2 hours 24 minutes. What current are you experiencing?

Answer 362

A head current of 1.5 knots

Question 363

Your vessel is making way through the water at a speed of 14 knots. Your vessel traveled 55 nautical miles in 3 hours 24 minutes. What current are you experiencing?

Answer 363

A following current of 2.2 knots

Question 364

Your vessel is making way through the water at a speed of 14 knots. Your vessel traveled 46 nautical miles in 3 hours 24 minutes. What current are you experiencing?

Answer 364

A head current of 0.5 knot

Question 365

Your vessel is making way through the water at a speed of 16 knots. Your vessel traveled 45 nautical miles in 2 hours 30 minutes. What current are you experiencing?

Answer 365

A following current of 2 knots

Question 366

Your vessel is making way through the water at a speed of 16 knots. Your vessel traveled 56 nautical miles in 3 hours 30 minutes. What current are you experiencing?

Answer 366

current is slack

Question 367

At 0000H you fix your position and change course to 090˚T At 0030H, you again fix your position, and it is 0.5 miles east of your DR position. Which statement is true?

Answer 367

The current is easterly

Question 368

At 0000H you fix your position and change course to 270˚T At 0030H, you again fix your position, and it is 0.5 miles east of your DR position. Which statement is true?

Answer 368

The set is 090, drift 1.0 knot

Question 369

At 0000H you fix your position and plot a new DR trackline. At 0200H, you again fix your position, and it is 0.5 miles west of your DR position. Which statement is true?

Answer 369

The set is 270, drift 0.25 knot

Question 370

At 0000H you fix your position and plot a new DR trackline. At 0200H, you again fix your position, and it is 0.5 miles west of your DR position. Which statement is true?

Answer 370

The drift is 0.25 knot

Question 371

At 0000H you fix your position and change course to 090˚ T At 0030H, you again fix your position, and it is 0.5 miles west of your DR position. Which statement is true?

Answer 371

The current is westerly

Question 372

At 1200H you fix your position and change course to 000˚ T At 1230H, you again fix your position, and it is 0.5 miles east of your DR position. Which statement is true?

Answer 372

The current is easterly

Question 373

At 1100H you fix your position and change course to 000˚T At 1130H, you again fix your position, and it is 0.5 miles west of your DR position. Which statement is true?

Answer 373

The current is westerly

Question 374

At 0000H you fix your position and change course to 180˚T At 0100H, you again fix your position, and it is 1.5 miles north of your DR position. Which statement is true?

Answer 374

The current is northerly

Question 375

At 1000H you fix your position and change course to 180˚T At 1030H, you again fix your position, and it is 0.5 miles south of your DR position. Which statement is true?

Answer 375

The current is southerly

Question 376

At 0900H you fix your position and change course to 135˚T At 0930H, you again fix your position, and it is 0.5 miles southwest of your DR position. Which statement is true?

Answer 376

The current set is 225 deg.

Question 377

At 0000H you fix your position and change course to 225˚T At 0130H, you again fix your position, and it is 0.5 miles northwest of your DR position. Which statement is true?

Answer 377

The current set is 315 deg.

Question 378

At 0800H you fix your position and change course to 045˚T At 0830H, you again fix your position, and it is 0.5 mile southeast of your DR position. Which statement is true?

Answer 378

The current set is 135 deg.

Question 379

At 0105H you fix your position and change course to 135˚T At 0135H, you again fix your position, and it is 0.5 mile southeast of your DR position. Which statement is true?

Answer 379

Dirft = 1.0 knot; Current Set = 135 deg.T

Question 380

At 1200H you fix your position and change course to 315˚T At 1225H, you again fix your position, and it is 0.9 mile southwest of your DR position. Which statement is true?

Answer 380

Drift = 2.1 knots; Current Set = 225 deg.T

Question 381

At 0300H you fix your position and change course to 225˚ At 0315H, you again fix your position, and it is 0.5 miles northwest of your DR position. Which statement is true?

Answer 381

Drift = 2 knots; Current Set = 315 deg.T

Question 382

At 0400H you fix your position and change course to 045˚T At 0450H, you again fix your position, and it is 1.0 mile northeast of your DR position. Which statement is true?

Answer 382

Drift = 1.2 knots; Current Set =045 deg. T

Question 383

A vessel is to proceed at 12 knots on a course of 211˚T through a current estimated to be setting at 255˚T and a drift of 3 knots. Find Course To Steer (CTS) and the speed of advance (SOA).

Answer 383

CTS = 199 deg.T; SOA = 10 knots

Question 384

You desire to make good a course of 062˚T to a destination 4.7 miles away. Your speed is 3 knots. The Tidal Current Table lists a set of 120˚T and a drift of 1 knot for the time period you will be making the passage. Find your course to steer (CTS) an

Answer 384

CTS = 046 deg.T; SOA = 3.3 3.3 knots

Question 385

The anchorage is located 20 nautical miles North of a vessel with a speed of 15 knots. A current is known to set 3 knots Easterly. Calculate the course to steer in order to drop her anchor to the charted anchorage on the spot.

Answer 385

349 deg.

Question 386

You are underway on course 180˚T at 22 knots. The apparent wind is from 70 deg. off the port bow, speed 20 knots. What is the true direction and speed of the true wind?

Answer 386

051 deg.T; 24.1 knots

Question 387

You are underway on course 270˚T at 10 knots. The apparent wind is from 10 deg. off the port bow, speed 30 knots. What is the true direction and speed of the true wind?

Answer 387

225 deg.T; 20 knots

Question 388

Your ship is on course 195˚T at 15 knots. The apparent wind is from 40 deg. on the port bow, speed 30 knots. The direction and speed of the true wind are:

Answer 388

027 deg.T; 21 knots

Question 389

Your ship is proceeding on course 150˚T at a speed of 17 knots. The apparent wind is from 40 deg on your starboard bow, speed 15 knots. Calculate the True wind direction and speed.

Answer 389

270 deg.T; 11 knots

Question 390

Your vessel’s course is 150˚T at 17 knots. The apparent wind is from 40 deg. off the starboard bow, speed 15 knots. What is the speed of the true wind?

Answer 390

11 knots

Question 391

When a body has crossed the observer’s meridian, this is called:

Answer 391

any of these

Question 392

During meridian passage, the LHA and meridian angle of the body is zero. What is its altitude?

Answer 392

maximum altitude

Question 393

To a certain observer, a meridian transit can be at: I. upper transit only II. Lower transit only

Answer 393

both I and II

Question 394

A body will be observed at lower transit only :

Answer 394

if the body is circumpolar

Question 395

At lower transit, the body’s altitude is at its minimum bearing North or South. What will be the LHA?

Answer 395

180 deg.

Question 396

The azimuth of the celestial body during meridian passage will be: I. North II.South

Answer 396

either I or II

Question 397

A vessel is heading magnetic northwest and its magnetic compass reads a heading of 317 deg. What action should be taken to remove this error dutring compass adjustment?

Answer 397

Move the quadrantal spheres in

Question 398

A vessel is heading magnetic northwest and its magnetic compass indicates a heading of 317 deg. What action should be taken to remove this error during compass adjustment?

Answer 398

If the quadrantal spheres are in as far as possible, replace them with larger spheres

Question 399

A vessel is heading magnetic northwest and its magnetic compass indicates a heading of 312 deg. What action should be taken to remove this error during compass adjustment?

Answer 399

If the quadrantal spheres are all the way out, replace them with smaller spheres

Question 400

A vessel is heading magnetic northwest and its magnetic compass indicates a heading of 312 deg. What action should be done to remove this error during compass adjustment?

Answer 400

Any of these

Question 401

A vessel is heading magnetic north and its magnetic compass is indicating is heading of 003 deg. What action should be taken to remove this error during compass adjustment?

Answer 401

If the red ends are to starboard, and the athwartship tray is at the bottom, you should remove some magnets.

Question 402

A vessel is heading magnetic north and its magnetic compass is indicating a heading of 356 deg. What action should be taken to remove this error during compass adjustment?

Answer 402

If the blue ends of the magnets are to starboard, and the athwartship tray is at the bottom, you should remove some magnets

Question 403

A vessel is heading magnetic north and its magnetic compass indicates a heading of 356 deg. What action should be done to remove this error during compass adjustment?

Answer 403

If the red ends of the magnets are to port, you should lower the athwartship tray tray

Question 404

A vessel is heading magnetic north and its magnetic compass indicates a heading of 003 deg. What action should be done to remove this error during compass adjustment?

Answer 404

Raise or lower the athwartship magnets

Question 405

A vessel is heading magnetic north and its magnetic compass indicates a heading of 003 deg. What action should be done to remove this error during compass adjustment?

Answer 405

If the red ends are to starboard, the athwarthship magnets should be lowered

Question 406

A vessel is heading magnetic east and its magnetic compasss indicates a heading of 093 deg. What action should be taken to remove this error during compass adjustment?

Answer 406

If the blue ends of the magnets are forward you should raise the fore-and-aft tray

Question 407

A vessel is heading magnetic east and its magnetic compasss indicates a heading of 086 deg. What actio should be taken to remove this error during compass adjustment?

Answer 407

If the blue ends of the magnets are aft, and the fore and aft tray is at the top, you should add some magnets

Question 408

A vessel is heading magnetic east and its magnetic compass reads a heading of 093 deg. What action should be taken to remove this error during compass adjustment?

Answer 408

If the red ends of the magnets are aft, you should raise the fore and aft tray.

Question 409

A vessel is heading magnetic east and its magnetic compass indicates a heading of 093 deg. What action should be taken to remove this error during compass adjustment?

Answer 409

If the red ends of the magnets are forward, and the fore-and-aft tray is at the bottom, you should remove some magnets

Question 410

A vessel is heading magnetic east and its magnetic compass indicates a heading of 086 deg. What action should be taken to remove this error during compass adjustment?

Answer 410

If the blue ends of the magnets are aft, and the fore-and-aft tray is at the top, you should add some magnets

Question 411

A vessel is heading magnetic east and its magnetic compass indicates a heading of 086 deg. What action should be taken to remove this error during compass adjustment?

Answer 411

If the red ends of the magnets are aft, you should lower the fore-and-aft tray

Question 412

A vessel is heading magnetic east and its magnetic compass indicates a heading of 076 deg. What action should be taken to remove this error during compass adjustment?

Answer 412

If the blue ends of the magnets are aft, and the fore-and-aft tray is at the top, you should add some magnets

Question 413

A vessel heading magnetic north and its magnetic compass indicates a heading of 356 deg. What action should be done to remove this error during compass adjustment?

Answer 413

If the red ends of the magnets are to starboard, and the athwartship tray is at the top, you should add some more magnets