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Second Semester (BSMT) > TERNAV (quizzes prelim) > Flashcards

TERNAV (quizzes prelim) Flashcards

1
Q

What is the purpose of an echo sounder on a ship?

A

To send sound wave pulses for navigation

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2
Q

Which of the following is NOT a method of radio navigation?

A

Deduced Reckoning

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3
Q

What is the definition of navigation?

A

The process of directing the movements of a craft from one point to another safely and at the shortest possible distance.

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4
Q

What is the purpose of a passage plan in navigation?

A

To guide the vessel’s safe passage by determining the most favorable route

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5
Q

What is the purpose of piloting in navigation?

A

To determine the position of a vessel relative to geographic points

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6
Q

What is the purpose of RADAR ARPA (AutomaticRadar Plotting Aid)?

A

To calculate collision avoidance data

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7
Q

What is electronic navigation?

A

Navigation involving the use of electronics in any way

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8
Q

Which of the following is NOT a purpose of electronic navigation?

A

Weather forecasting

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9
Q

What is dead reckoning in navigation?

A

Determining position by advancing a known position for courses and distances

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10
Q

What is the main function of a passage plan?

A

To gather safety and navigation information for a safe voyage

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11
Q

How is an ellipsoid uniquely defined?

A

By specifying the semi-major axis and the flattening.

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12
Q

How many primary reference surfaces for the Earth are used in geodetic applications?

A

(not two)

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13
Q

What is the Mercator projection commonly used for in maritime navigation?

A

To show rhumb lines as straight lines.

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14
Q

What type of projection is the Lambert conformal projection?

A

Conic projection

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15
Q

Why is it necessary to project the surface of a sphere onto a developable surface?

A

-

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16
Q

What is the chart datum?

A

An approximation of the actual mean height of sea level.

17
Q

What is the geoid?

A

An equipotential surface that would coincide with the mean ocean surface of the Earth if the oceans and atmosphere were in equilibrium.

18
Q

What is the difference between an ellipsoid height and a geoid height?

A

An ellipsoid height is the distance a given point is above or below the ellipsoid surface, while a geoid height is the distance the geoid surface is above or below the ellipsoid surface.

19
Q

What is the purpose of the geoid in geodetic applications?

A

To approximate mean sea level (MSL) heights.

20
Q

What is the distinguishing feature of the Mercator projection?

A

Expansion of both meridians and parallels at the same ratio with increased latitude.

Second Semester (BSMT) (11 decks)

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