You are signing on your crew. Which is NOT authorized?

Correct Answer: Option A — A man presenting his Chief Mate endorsement to sign on as able seaman

46 CFR 15.401 requires mariners to hold an endorsement appropriate for the specific rating they are filling. A Chief Mate holds a deck officer license, not an Able Seaman (AB) rating. While an officer may be qualified to perform AB duties, they must possess the specific AB endorsement to be legally signed on.