Each person on a MODU carrying immersion suits must wear the immersion suit in a boat drill, or participate in a drill which includes donning the suit and being instructed in its use at least once every __________.

Correct Answer: Option A — month

USCG regulations for MODUs carrying immersion suits require every crewmember to practice donning the suit and receive operational instruction during drills at least once every month to maintain proficiency in hypothermia prevention.