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Captains License 6 Pack > Navigation/Piloting > Flashcards

Flashcards in Navigation/Piloting Deck (79):
1

When you are steering on a pair of range lights and find the upper light is above the lower light you should...
Select one:
a. Come right
b. Continue on present course
c. Come left
d. Wait until the lights are no longer in a vertical line

b. Continue on present course

2

Buoys are marked with reflective material to assist in their detection by search light. Which statement is true?
Select one:
a. A preferred-channel buoy displays either red or green reflective material to agree with the top band of color
b. A special-purpose mark will display either red or green reflective material to agree with its shape
c. A safe-water buoy will display red and white vertical stripes of reflective material
d. All reflective material is white because it is the most visible at night

a. A preferred-channel buoy displays either red or green reflective material to agree with the top band of color

3

A triangular daymark would be colored...
Select one:
a. Red
b. Green and white
c. Green
d. Red and white

a. Red

4

Chart legends printed in capital letters show that the associated landmark is...
Select one:
a. Conspicuous
b. Inconspicuous
c. A government facility or station
d. A radio transmitter

a. Conspicuous

5

What daymark shape is used in the lateral system?
Select one:
a. Pentagon
b. Diamond
c. Triangle
d. Semicircle

c. Triangle

6

What are the colors of a mid-channel daymark?
Select one:
a. Black and red
b. Green and yellow
c. Green and white
d. Red and white

d. Red and white

7

The light rhythm of Morse (A) is shown on...
Select one:
a. Preferred-channel buoys
b. Safe water buoys
c. Starboard or port-side buoys
d. Special marks

b. Safe water buoys

8

Which buoy may be even numbered?
Select one:
a. Special Purpose buoy
b. Unlighted nun buoy
c. Mid-channel buoy
d. Lighted green buoy

b. Unlighted nun buoy

9

What feature(s) of a daymark is (are) used to identify the beacon upon which it is mounted?
Select one:
a. Size
b. Signal characteristics
c. Method of construction
d. Color and shape

d. Color and shape

10

Red lights may appear on
Select one:
a. Yellow buoys
b. Vertically stripped buoys
c. Spherical buoys
d. Horizontally banded buoys

d. Horizontally banded buoys

11

In the U.S. Aids to Navigation System, red and green horizontally banded buoys mark...
Select one:
a. General anchorage areas
b. Junctions or bifurcation
c. Fishing grounds
d. Channels for shallow draft vessels

b. Junctions or bifurcation

12

A nun buoy will ____________________.
Select one:
a. be left to port when entering from seaward
b. be green in color
c. be cylindrical in shape
d. have an even number

d. have an even number

13

On entering from seaward, a starboard side daymark will...
Select one:
a. Show a fixed red light if lighted
b. Have an even number if numbered
c. Be square in shape
d. Show a Morse (A) white light

b. Have an even number if numbered

14

The time required for a lighted aid to complete a full cycle of light changes is called its...
Select one:
a. Function
b. Period
c. Set
d. Frequency

b. Period

15

The annual change for variation for an area can be found in...
Select one:
a. The compass deviation table
b. Variation does not change
c. The center of the compass rose on a chart of the area
d. The handbook for Magnetic Compass Adjustment, Pub 226

c. The center of the compass rose on a chart of the area

16

Which buoy may be odd numbered?
Select one:
a. Unlighted can buoy
b. A spherical buoy
c. A yellow buoy
d. A red buoy

a. Unlighted can buoy

17

Under the IALA-B Buoyage System, a conical buoy will be...
Select one:
a. Left to port when entering from seaward
b. Red in color
c. identified by a letter
d. Numbered with an odd number

b. Red in color

18

ome lights used as aids to marine navigation have a red sector to indicate a danger area. The limits of a colored sector of a light listed in the light list in which of the following manners?
Select one:
a. An outline of the area of the sector
b. True bearings as observed from the ship toward the light
c. Geographic positions outlining the area of the sector
d. True bearings as observed from the light towards the ship

b. True bearings as observed from the ship toward the light

19

What are the characteristics of an isophase light?
Select one:
a. 2 sec. Flash, 5 sec eclipse
b. 1 sec. Flash, 1 sec. Eclipse
c. 4 sec. Flash, 2 sec. Eclipse, 3 sec. Flash, 2 sec. eclipse
d. 6 sec. Flash, 3 sec. Eclipse

b. 1 sec. Flash, 1 sec. Eclipse

20

Which navigational mark may only be lettered?
Select one:
a. A port side dayshape
b. An unlighted green, can buoy
c. A spherical buoy
d. A red buoy

c. A spherical buoy

21

To find a magnetic compass course from a true course you must apply ________________________.
Select one:
a. Magnetic anomalies (local disturbances)
b. Variation
c. Deviation and variation
d. Deviation

c. Deviation and variation

22

The lubber's line on a magnetic compass indicates__________.
Select one:
a. a relative bearing taken with an azimuth circle
b. magnetic north
c. compass north
d. the direction in which the boat's bow is heading.

d. the direction in which the boat's bow is heading.

23

Deviation is not constant; it is different with every change in...
Select one:
a. Vessel heading
b. Speed
c. Cargo
d. Geographic location

a. Vessel heading

24

Deviation is caused by ____________________.
Select one:
a. Nearby magnetic land masses or mineral deposits
b. Changes in the earth's magnetic field
c. Magnetic influence inherent to that particular vessel
d. The magnetic lines of force not coinciding with the lines of longitude

c. Magnetic influence inherent to that particular vessel

25

As a vessel changes course to starboard, the compass card in a magnetic compass ____________.
Select one:
a. remains aligned with compass north
b. turns counterclockwise to port
c. also turns to starboard
d. first turns to starboard then counterclockwise to port

a. remains aligned with compass north

26

The most important feature of the material used for making the binnacle of a standard magnetic compass is that it is__________.
Select one:
a. capable of being permanently affixed to the vessel
b. nonmagnetic
c. corrosion resistant
d. weatherproof

b. nonmagnetic

27

If the compass heading and the magnetic heading are the same, then __________________.
Select one:
a. the deviation has been offset by the variation
b. There is no deviation on that heading
c. the compass is being influenced by nearby metals
d. there is something wrong with the compass

b. There is no deviation on that heading

28

Magnetic heading differs from compass heading by ________________.
Select one:
a. Variation
b. Deviation
c. True Heading
d. Compass error

b. Deviation

29

If the magnetic heading is greater than the compass heading, the deviation is __________________.
Select one:
a. West
b. East
c. South
d. North

b. East

30

If a magnetic compass is not affected by any magnetic field other than the earth's, which statement is true?
Select one:
a. Compass error and variation are equal
b. There will be no compass error
c. Compass north will be true north
d. Variation will equal deviation

a. Compass error and variation are equal

31

Compass error is equal to the ___________________.
Select one:
a. deviation minus variation
b. total effect of variation and deviation taken together
c. variation plus compass course
d. difference between true and magnetic compass

b. total effect of variation and deviation taken together

32

The difference in degrees between true north and magnetic north is called ____________________.
Select one:
a. PSC
b. Deviation
c. Variation
d. Drift

c. Variation

33

In applying variation to a true course to obtain a magnetic course ___________________.
Select one:
a. you should subtract east and subtract west
b. you should subtract east and add west
c. you should add north and subtract south
d. you should add east and add west

b. you should subtract east and add west

34

Variation is not constant; it is different with every change in __________.
Select one:
a. geographic location
b. vessel heading
c. cargo
d. speed

a. geographic location

35

The datum from which the predicted heights of tides are reckoned in the tide tables is...
Select one:
a. Given in table three of the tide tables
b. Mean low water
c. The highest possible level
d. The same as that used for the charts of the locality

d. The same as that used for the charts of the locality

36

Where would you find information about the time of high tide at a specific location on a particular day of the year?
Select one:
a. Coast Pilot
b. Nautical Almanac
c. Tidal Current Tables
d. Tide Tables

d. Tide Tables

37

The point where the vertical rise or fall of tide has stopped is referred to as...
Select one:
a. The stand of the tide
b. The rip tide
c. The reverse of the tide
d. Slack water

a. The stand of the tide

38

Which term refers to the direction a current is flowing?
Select one:
a. Set
b. Drift
c. Stand
d. Vector direction

a. Set

39

The drift and set of tidal, river, and ocean currents refer to the __________________.
Select one:
a. type and characteristic of the current flow
b. position and area of current
c. maximum speed of the current
d. speed and direction toward which current flows

d. speed and direction toward which current flows

40

The distance between the surface of the water and the tidal datum is the...
Select one:
a. Actual water depth
b. Range of tide
c. Height of tide
d. Charted depth

c. Height of tide

41

A tide is called diurnal when...
Select one:
a. Two high tides occur during a lunar day
b. Only one high and one low water occur during a lunar day
c. The high tide is higher and the low tide is lower than usual
d. The high tide and low tide are exactly six hours apart

b. Only one high and one low water occur during a lunar day

42

The term "flood Current" refers to that time when the water...
Select one:
a. Is moving towards the ocean
b. Level is rising because of heavy rains
c. Level is not changing
d. Is flowing towards land

d. Is flowing towards land

43

When the moon is new or full which type of tides occur?
Select one:
a. Apogean
b. Neap
c. Spring
d. Diurnal
Feedback
The correct answer is: Spri

c. Spring

44

The movement of water away from shore or downstream is called a(n)...
Select one:
a. Reversing current
b. Slack current
c. Ebb current
d. Flood current
Feedback
The correct answer is: Ebb cur

c. Ebb current

45

The difference between the heights of low and high tide is the...
Select one:
a. Period
b. Depth
c. Range
d. Distance

c. Range

46

Spring tides occur ___________________.
Select one:
a. only when the Sun and Moon are on the same side of the Earth and nearly in line
b. when the Sun, Moon, and Earth are nearly in-line, in any order
c. at the start of Spring, when the Sun is nearly over the equator
d. when the Sun and Moon are approximately 90° to each other as seen from earth

b. when the Sun, Moon, and Earth are nearly in-line, in any order

47

What does the term "tide" refer to?
Select one:
a. Vertical movement of the water
b. Horizontal movement of the water
c. Mixing tendency of the water
d. Salinity content of the water

a. Vertical movement of the water

48

Information about currents on the Pacific Coast of the U.S. is found in the...
Select one:
a. Tidal Current Tables .
b. Ocean Current Tables
c. Nautical Almanac
d. Tide Tables

a. Tidal Current Tables

49

To predict the actual depth of water using the Tide Tables the number obtained from the Tide Tables is ______________.
Select one:
a. multiplied by the charted depth
b. added or subtracted to the charted depth
c. divided by the charted depth
d. the actual depth

b. added or subtracted to the charted depth

50

Which part of the anchor actually digs into the bottom and provide holding power?
Select one:
a. Stock
b. Fluke
c. Crown
d. Shank

b. Fluke

51

What is the normal length of anchor cable used to anchor a vessel?
Select one:
a. An amount equal to the depth of the water
b. Five to seven times the depth of water
c. Two times the depth of water
d. Three to four times the depth of water

b. Five to seven times the depth of water

52

The line connecting the anchor with a vessel is called _________.
Select one:
a. windless
b. vertical load
c. scope
d. rode

d. rode

53

The BEST method of protecting that portion of a fiber anchor line nearest the anchor from chafing on the bottom is by ____________.
Select one:
a. using a synthetic line
b. using a small scope ratio
c. using a hockle to keep that portion of the anchor line off the bottom
d. replacing that portion with a short length of chain

d. replacing that portion with a short length of chain

54

Using a scope of 6, determine how much anchor rode you should put out to anchor in 12 feet (3.7 meters) of water.
Select one:
a. 2 feet (0.6 meters)
b. 48 feet (14.6 meters)
c. 18 feet (5.5 meters)
d. 72 feet (21.9 meters)

d. 72 feet (21.9 meters)

55

The holding power of an anchor at a given scope of cable increases when the ___________.
Select one:
a. amount of chain lying along the bottom increases
b. mooring line tension is increased
c. amount of chain lying along the bottom decreases
d. length of the catenary is reduced

a. amount of chain lying along the bottom increases

56

The holding power of an anchor is primarily determined by the ___________.
Select one:
a. size of the vessel and its draft
b. anchor's ability to dig in
c. shape of the anchor
d. stowage of the anchor on board

b. anchor's ability to dig in

57

To safely anchor a vessel there must be sufficient scope in the anchor cable. Scope is the ratio of_______________.
Select one:
a. the weight of cable to weight of vessel
b. the length of the anchor line or anchor rode to the depth of the water
c. the length of anchor to depth of water
d. the weight of cable to weight of anchor

b. the length of the anchor line or anchor rode to the depth of the water

58

The best method of determining if a vessel is dragging anchor is to note_________.
Select one:
a. the amount of line paid out
b. changes in bearings of fixed objects onshore
c. any change in the tautness of the anchor chain
d. how much the vessel sheers while at anchor

b. changes in bearings of fixed objects onshore

59

The best method to stop a vessel from dragging anchor is to _________.
Select one:
a. reduce the length of the cable
b. swing the rudder several times to work the anchor into the bottom
c. back the engines
d. pay out more anchor rode

d. pay out more anchor rode

60

When a small craft's anchor refuses to break free, the operator should ___________.
Select one:
a. haul vertically on the line
b. back down using the force of the engine
c. run in a wide circle, slowly, to change the angle of pull
d. increase the scope with the anchor line taut

c. run in a wide circle, slowly, to change the angle of pull

61

By paying out more anchor rode, you_________.
Select one:
a. increase the possibility that your vessel will drag anchor
b. decrease the swing of your vessel while at anchor
c. increase the holding power of your anchor
d. decrease the holding power of your anchor

c. increase the holding power of your anchor

62

While anchoring your vessel, the best time to let go the anchor is when the vessel is...
Select one:
a. making slight sternway due to wind or current
b. dead in the water
c. moving fast ahead over the ground
d. moving fast astern over the ground

a. making slight sternway due to wind or current

63

Which type of bottom is best suited for holding an anchor of a small boat?
Select one:
a. A mixture of mud and clay
b. Loose sand
c. Gravel
d. Rock and coral

a. A mixture of mud and clay

64

A sufficient amount of anchor rode must be used when anchoring a vessel to ensure ____________.
Select one:
a. there is more chain out than there is in the chain locker
b. the anchor flukes bite into the bottom of the seabed
c. the vessel has enough room to swing while at anchor
d. there is a sufficient scope of chain to keep the anchor on the bottom

b. the anchor flukes bite into the bottom of the seabed

65

In modern depth indicating equipment the sonic or ultrasonic sound signals are produced electrically by means of a(n)...
Select one:
a. transducer
b. amplifier
c. transceiver
d. transmitter

a. transducer

66

A fathometer shows the depth from __________________.
Select one:
a. the keel to a hard bottom
b. the waterline to a soft bottom
c. the waterline to the bottom
d. the bottom of the vessel to the seabed

d. the bottom of the vessel to the seabed

67

All modern depth sounders can measure the __________.
Select one:
a. average depth of the water to a soft bottom
b. average depth from the waterline to hard bottom
c. depth of the water below the location of the transducer
d. actual depth of the water

c. depth of the water below the location of the transducer

68

Which general statement concerning radar is FALSE?
Select one:
a. Radar bearings are less accurate than radar ranges.
b. The ability of radar to detect objects is unaffected by weather conditions, especially dense rain.
c. Raising the antenna height increases the radar range.
d. Radar should be checked regularly during clear weather to ensure it is operating properly.

b. The ability of radar to detect objects is unaffected by weather conditions, especially dense rain.

69

The highest level of navigational accuracy is provided by __________.
Select one:
a. DPPS
b. DGPS
c. NAVSAT
d. DSPS

b. DGPS

70

Which of the following is NOT a limitation of radar
Select one:
a. Minimum and maximum range settings.
b. Mechanical and electrical failures
c. Radar transmission is line of sight
d. Radar may be used at night in low visibility conditions.

d. Radar may be used at night in low visibility conditions.

71

What would give the best radar echo?
Select one:
a. A 300-foot freighter, bow on.
b. A 300-foot freighter, beam on.
c. A 100-foot fishing vessel with a radar reflector in its rigging.
d. The beam of a three masted sailing vessel with all sail set.

b. A 300-foot freighter, beam on.

72

You are approaching a RACON it may be identified on the radar by __________.
Select one:
a. a circle appearing on the scope.
b. a dashed line running from the center of the scope.
c. an audible signal when the sweep crosses.
d. a coded signal appearing on the same bearing at a greater range.

d. a coded signal appearing on the same bearing at a greater range.

73

An electronic depth finder operates on the principle that __________.
Select one:
a. sound waves travel at a constant speed through the water
b. radio signals reflect from a solid surface
c. pressure increases with depth
d. radar signals travel at a constant speed through the water

a. sound waves travel at a constant speed through the water

74

When using GPS (Global Positioning System) you may expect your position to be accurate within a radius of...
Select one:
a. 20 meters
b. 50 meters
c. 10 meters
d. 100 meters

a. 20 meters

75

The modified civilian system that approaches military precision in global positioning is called _________________.
Select one:
a. PGPS
b. CGPS
c. GPS
d. DGPS

d. DGPS

76

Which statement concerning the operation of radar in fog is TRUE?
Select one:
a. A sandy beach will show up clearer on radar than a rocky cliff.
b. Navigation buoys will always show up on a radar.
c. Radar ranges are less accurate in fog.
d. Small wooden boats may not show up on radar.

d. Small wooden boats may not show up on radar.

77

What should you apply to a Fathometer reading to determine the depth of water?
Select one:
a. Subtract the draft of the vessel.
b. Add the draft of the vessel.
c. Subtract the sea water correction.
d. Add the sea water correction.

b. Add the draft of the vessel.

78

The description "RACON" besides an illustration on a chart would mean a __________?
Select one:
a. circular radio beacon
b. radar calibration beacon
c. radar conspicuous beacon
d. radar transponder beacon

d. radar transponder beacon

79

What does not contribute to the accuracy of a GPS?
Select one:
a. Position satellite errors
b. Satellite and receiver clock timing errors
c. Ship's speed
d. Atmospheric variations

c. Ship's speed