46 C.F.R. § 12.25-10 General requirements.
Title 46 - Shipping
(a) Merchant mariner's documents shall be issued without professional examination to applicants for certificates of service as endorsements on merchant mariner's documents in capacities other than able seaman, lifeboatman, tankerman or qualified member of the engine department and shall be endorsed for one or more ratings. For example, ordinary seaman—wiper—steward's department (F.H.). Holders of documents endorsed for service as ordinary seaman may serve in any unqualified rating in the deck department. Holders of documents endorsed for service as wiper may serve in any unqualified rating in the engine department. Documents endorsed for steward's department (F.H.) will authorize the holder's service in any capacity in the steward's department. (See §12.02–11(e)(2) for unqualified ratings in the staff department.) (b) When the holder of a merchant mariner's document has qualified as a food handler, the endorsement of his rating will be followed by the further endorsement (F.H.). [CGFR 65–50, 30 FR 16640, Dec. 30, 1965, as amended by USCG-2002–13058, 67 FR 61278, Sept. 30, 2002]
Title 46: Shipping
PART 12—CERTIFICATION OF SEAMEN
Subpart 12.25—Certificates of Service for Ratings Other Than Able Seaman or Qualified Member of the Engine Department
§ 12.25-10 General requirements.

