As Master or person in charge, you must notify the U.S. Coast Guard if an injury leaves a crewman unfit to perform routine duties for more than __________.

Correct Answer: Option D — Any amount of time

Under 46 CFR 4.05-1, a marine casualty report (Form CG-2692) is required for any injury that requires medical treatment beyond first aid and renders a crewmember unfit to perform routine duties for any amount of time. There is no minimum hourly threshold before reporting is mandatory.