Coast Guard Exams
Question 369Deck Safety70% to pass

The color of the signal flares sent up by a submarine about to surface from periscope depth is _______________.

AI Explanation
The correct answer is D) white. The color of the signal flares sent up by a submarine about to surface from periscope depth is white. This is in accordance with the International Regulations for Preventing Collisions at Sea (COLREGS), which specify that a submarine about to surface should display a white signal flare to indicate its presence and intended action. The other answer options are incorrect because yellow, red, and green flares are not the standard signals used by submarines in this situation. White flares provide the most visible and recognizable indication to nearby vessels that a submarine is about to surface, allowing them to take appropriate precautions.

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