Regulations require certain records to be retained on board for at least 3 months after a MODU is involved in a casualty or until advised that they are no longer needed on board by the __________.

Correct Answer: Option B — Officer in Charge, Marine Inspection

46 CFR 109.415 states that records must be kept for 3 months or until the Officer in Charge, Marine Inspection (OCMI) advises they are no longer needed. The OCMI holds the authority to determine when the investigative need for these documents has concluded.