OIC NAVIGATIONAL WATCH: An electronic depth finder operates on the principle that ___

An electronic depth finder operates on the principle that ________.

A.sound waves travel at a constant speed through water
B.radio signals reflect from a solid surface
C.radar signals travel at a constant speed through water
D.pressure increases with depth


Answer:

A.sound waves travel at a constant speed through water

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Marina Board Exam Reviewer

You are proceeding along the right bank of a narrow channel aboard a righthanded single-screw vessel. The vessel starts to sheer due to bank suction/cushion effect. You should:
 A. increase speed and put the rudder right full
B. back full with rudder amidships
C. decrease speed and put the rudder right full
D. stop engines and put the rudder left full


COMPETENCE 1 PLAN AND CONDUCT A PASSAGE AND DETERMINATION POSITION

ANSWER:

A. increase speed and put the rudder right full

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Marina Exam Answers

The apparent wind can be zero when the true wind is from:

A. ahead and equal to twice the ship's speed
B. astern and equal to twice the ship's speed
C. ahead and equal to the ship's speed
D. astern and equal to the ship's

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Marina Exam for OIC

When the index mirror and the horizon mirror of the sextant are parallel, the sextant should read:

A. 0deg.
B. 60deg.
C. 90deg.
D. 120deg.

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Internationally used value of the atmospheric pressure in metric system

Internationally used value of the atmospheric pressure in metric system.

A. 29.92 inches
B. 1,013 millibars
C. 760 mm column of mercury
D. 14.7 lbs per square inch

Answer: B. 1,013 millibars

Polar distance can never be more than:

A. 180deg. from either poles
B. 90deg. N or S of the equator
C. 45deg. N or S of the equator
D. 360deg. only

Answer: A. 180deg. from either poles

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The visible diameter of the sun as seen from the Earth during perihelion is:

The visible diameter of the sun as seen from the Earth during perihelion is: 

A.42.0' 
B. 10.0' 
C. 32.6' 
D. 51.5' 

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Due to the revolution of the earth around the sun, a sidereal day is shorter than a solar day by about:

Due to the revolution of the earth around the sun, a sidereal day is shorter than a solar day by about:

A. 3 mins and 26 secs 

B. 3 mins and 06 secs

C. 3 mins and 36 secs

D. 3 mins and 56 secs

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The orbital speed of the earth is:

The orbital speed of the earth is:

A. 18.5 nautical miles per second
B. 29.8 nautical miles per second
C. 16.1 nautical miles per second
D. 900 nautical miles per second

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Heeling error is defined as the change of deviation for a heel of:

Heeling error is defined as the change of deviation for a heel of:

A. 1deg. while the vessel is on a compass heading of 000deg.
B. 2deg. while the vessel is on an intercardinal heading
C. 2deg. and is constant on all headings
D. 1deg. while the vessel is on a compass heading of 180deg.

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ANSWER: A. 1deg. while the vessel is on a compass heading of 000deg. 

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What is the highest sustained surface wind speed of a Tropical Storm?

What is the highest sustained surface wind speed of a Tropical Storm? 

A. 34 to 63 knots 

B. 30 to 55 knots 

C. 28 to 50 knots 

D. more than 60 knots

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The standard sea level pressure of the atmosphere is:

 The standard sea level pressure of the atmosphere is:

A. 1013.25 millibars of mercury
B. 1013.52 millibars of mercury
C. 1012.35 millibars of mercury
D. 1012.45 millibars of mercury


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