The color of rockets, shells, or rocket parachute flares used to indicate that the vessel is in distress and requires immediate assistance is __________.

Correct Answer: Option C — red

SOLAS Chapter III and 46 CFR standards mandate that pyrotechnic distress signals, including rocket parachute flares, hand flares, and smoke signals used to indicate a vessel is in distress, must be international orange for smoke and bright red for rockets and flares.