TERNAV2 (PRELIM)

Question 1

In determining the vessel’s position accurately, these _ play a crucial role in assisting the navigator.

Answer 1

navigational instruments

Question 2

It also provides reliable information regarding the vessel’s position in terms of latitude and longitude coordinates

Answer 2

navigational instruments

Question 3

During the _ stage of passage planning, utilizing these instruments will help ensure the vessel stays on her course and follows the planned route effectively

Answer 3

Execution and Monitoring

Question 4

Navigators can verify the vessel’s position in terms of geographical coordinates, using a.

Answer 4

chart/nautical chart

Question 5

Charts can be used to plot

Answer 5

DR(Dead Reckoning),EP(Estimated Position), FP(Fix Position) and track the vessel’ progress along the planned route

Question 6

provides the indication of the vessel’s heading, and when the appropriate corrections are applied, (Variation and Deviation), the vessel’s true course can be determined accurately.

Answer 6

Compass

Question 7

, are used to measure distances between the vessel’s plotted position and the referenced charted object on a nautical chart.

Answer 7

Compass dividers

Question 8

A navigational instrument used for
determining the angle between the horizon
and a celestial body such as the Sun, the
Moon, or a star.

Answer 8

sextant

Question 9

It is used in celestial navigation to determine
the vessel’s geographical position in terms of
latitude and longitude.

Answer 9

sextant

Question 10

A satellite-based navigation system that
uses a network of satellite which
provides accurate position information
anywhere on Earth.

Answer 10

GPS ( G L O B A L
P O S I T I O N I N G
S Y S T E M )

Question 11

is an effective instrument to
determine a vessel’s position when the
visibility has dropped

Answer 11

Radar

Question 12

It also provides range and bearing of the
interrogated object, using it as a reference
point in determining the vessel’s position

Answer 12

R A D A R
( R A D I O
D I R E C T I O N AND RANGING

Question 13

An effective way of utilizing radar is by _ in conjunction with
a chart and comparing the radar bearing by
visual bearings.

Answer 13

Cross- checking the radar range

Question 14

The geographical location of a vessel
relative to a reference point or the
coordinate system ( Latitude and
Longitude)

Answer 14

P O S I T I O N

Question 15

It can be represented in terms of
specific coordinates or plotted
graphically on a nautical chart.

Answer 15

P O S I T I O N

Question 16

It is the determination of position by advancing a last
known position for courses and distance

Answer 16

D E A D
R E C K O N I N G
P O S I T I O N ( D R )

Question 17

The method used to forecast where the vessel will be,
knowing the _

Answer 17

true course and speed alone

Question 18

It does not consider external factors such as currents, wind drift, or magnetic variation, so it provides an approximate position based solely on the vessel’s or aircraft’s movements

Answer 18

D E A D
R E C K O N I N G
P O S I T I O N ( D R )

Question 19

A method to forecast where the vessel
will be, knowing true course and speed,
set and drift

Answer 19

E S T I M A T E D
P O S I T I O N ( E P )

Question 20

It considers factors such as course
changes, speed variations, and external
influences (e.g., currents, wind) since the
last known position

Answer 20

E S T I M A T E D
P O S I T I O N ( E P )

Question 21

Refers to a precisely determined
location of a vessel at a specific
point in time

Answer 21

F I X E D
P O S I T I O N ( F P )

Question 22

Obtained through accurate
navigational methods such as
celestial navigation, GPS (Global
Positioning System), radar fixes, or
visual bearings to known landmarks

Answer 22

F I X E D
P O S I T I O N ( F P )

Question 23

provide a high level
of accuracy in the vessel’s or
aircraft’s location and are commonly
used for navigation, charting

Answer 23

Fixed positions

Question 24

The use of LOPs (Line of Position) of several
navigational aids to obtain a position fix

Answer 24

C R O S S B E A R I N G

Question 25

IN CROSS BEARINGS, BUOYS

Answer 25

MUST NOT BE USED IN TRANSIT

Question 26

A situation where the LOPs obtained intersect to form a “triangle” or “ irregular shape” instead of an intersecting point

Answer 26

C O C K E D H A T

Question 27

It indicates uncertainty in the vessel’s position

Answer 27

C O C K E D H A T

Question 28

Smaller cocked hat

Answer 28

= Smaller error

Question 29

* Larger cocked hat

Answer 29

= Larger ERROR

Question 30

To measure courses, use the

Answer 30

chart’s compass rose

Question 31

Transfer _ using parallel rulers or triangles

Answer 31

course lines to and from the compass rose

Question 32

may give true and magnetic directions.

Answer 32

Compass roses

Question 33

are on the outside of the rose; magnetic directions are on the inside

Answer 33

True directions

Question 34

One minute of latitude =

Answer 34

One nautical mile

Question 35

is a DR position corrected for the effects of leeway, steering error, and current.

Answer 35

E P ( E S T I M A T E D P O S I T I O N )

Question 36

It involves calculating the set and drift and applying these values to the DR to obtain an

Answer 36

EP(estimated position)

Question 37

is enclosed with a square and labeled horizontally with the time

Answer 37

EP(estimated position)

Question 38

the periodic horizontal movement of the water’s surface by the tide- affecting gravitational forces of the Moon and Sun

Answer 38

Tidal Current

Question 39

the horizontal movement of the sea surface caused by meteorological, oceanographic, or topographical effects

Answer 39

Current

Question 40

refers to the current’s direction

Answer 40

set

Question 41

refers to the current’s speed

Answer 41

drift

Question 42

the leeward motion of vessel due to that component of the wind vector perpendicular to the vessel’s track

Answer 42

leeway

Question 43

combine to produce the most pronounced

Answer 43

Leeway and current

Question 44

– the direction of a straight line from the last fix to the EP

Answer 44

Estimated course made good

Question 45

– the length of the course made good divided by the time between the fix and the EP

Answer 45

Estimated speed made good

Question 46

Measures the angle between two reference points observed from the observer's position

Answer 46

P O S I T I O N B Y H O R I Z O N T A L A N G L E S

Question 47

Using a sextant, the navigator measures the horizontal angle between the two selected reference points

Answer 47

P O S I T I O N B Y H O R I Z O N T A L A N G L E S

Question 48

The HA (Horizontal Angle) measured could be:

Answer 48

* HA = 90O (no need to calculate complements) * HA >90O * HA<90O

Question 49

If the HA is <90o, the angles are measured from the baseline _ the ship

Answer 49

TOWARDS

Question 50

If the HA is >90o, the angles are measured from the baseline _ from the ship

Answer 50

AWAY

Question 51

how to P O S I T I O N B Y H O R I Z O N T A L A N G L E S

Answer 51

* Construct 2 Position Circles * FIX will be where the 2 position circles intersect

Question 52

– measuring the angle between the Top of an Object and the horizon

Answer 52

Vertical Sextant Angle

Question 53

Two conspicuous objects are said to be in transit when both are in a straight line, as seen from the ship

Answer 53

P O S I T I O N L I N E B Y T R A N S I T B E A R I N G

Question 54

Bearing of both objects are the same

Answer 54

P O S I T I O N L I N E B Y T R A N S I T B E A R I N G

Question 55

When in transit, the ship must be on a straight line passing though the objects

Answer 55

P O S I T I O N L I N E B Y T R A N S I T B E A R I N G

Question 56

It provides a good opportunity to obtain the compass error

Answer 56

P O S I T I O N L I N E B Y T R A N S I T B E A R I N G