46 CFR § 131.410 - Certificate of proficiency.

A merchant mariner credential or merchant mariner's document with an endorsement of lifeboatman or another inclusive rating under part 12 of this title is evidence of training in survival craft and serves as a certificate of proficiency. For this subpart, a “certificated” person is a person holding a merchant mariner credential or merchant mariner's document with such an endorsement.

[CGD 82–004 and CGD 86–074, 62 FR 49340, Sept. 19, 1997, as amended by USCG–2006–24371, 74 FR 11266, Mar. 16, 2009]