TheoryUSCG OUPV / Master Captain Licence Practice Test Video
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Q1What is the arc of visibility for sidelights?
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✓ Correct answer: 135 degrees
Sidelights (red to port, green to starboard) each cover 112.5 degrees from dead ahead.
Q2A power-driven vessel underway less than 50 meters in length must exhibit how many masthead lights?
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✓ Correct answer: Two masthead lights
A power-driven vessel under 50m may show one masthead light (Rule 23(a)).
Q3A sailing vessel underway must show which lights?
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✓ Correct answer: Sidelights and stern light
A sailing vessel shows sidelights and a stern light (Rule 25). No masthead light when under sail only.
Q4A vessel not under command shows which lights?
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✓ Correct answer: One red and one white light in a vertical line
A vessel not under command shows two all-round red lights in a vertical line (Rule 27(a)).
Q5What lights does a vessel constrained by her draft display?
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✓ Correct answer: Two all-round red lights in a vertical line
A vessel constrained by draft shows three all-round red lights in a vertical line (Rule 28).
Q6What color is the stern light?
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✓ Correct answer: Yellow
The stern light is a white light visible over 135 degrees centered on the stern (Rule 21(c)).
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