What is the minimum visibility range for the masthead light on a vessel 50 meters or more in length?

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Multiple choice — select the best answer

A3 miles
B4 miles
C6 miles
D5 miles

✓ Correct answer: D. 5 miles Masthead lights on vessels 50m or more must be visible at 6 miles (Annex I).

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Topic: Navigation Lights (COLREGS)

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What is the minimum visibility range for the masthead light on a vessel 50 meters or more in length?

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