The person-in-charge shall insure that each rescue boat on an OSV is lowered to the water, launched and operated at least once every __________.

Correct Answer: Option C — three months

46 CFR 131.545 mandates that rescue boats on OSVs must be launched and operated at least once every three months. This drill ensures that the launching equipment remains functional, the boat is seaworthy, and the crew maintains the necessary proficiency to deploy the craft rapidly during an actual emergency.