Question 3161 Deck General

The correct answer is B) Bosun. The Merchant Mariner Credential (MMC) is the official document issued by the U.S. Coast Guard that shows a mariner's qualifications and endorsements. A single endorsement for "Bosun" would be suspicious, as this is a supervisory position in the deck department that requires additional training and sea service beyond an entry-level unlicensed rating. The other options are incorrect because: A) "Steward's Department (F.H.)" is a valid endorsement for unlicensed personnel in the steward's department, C) "any unlicensed rating in the deck department including AB" is a valid endorsement, and D) the "Certificate of Registry" is a separate document from the MMC.