CFR › Title 46 › Part 42 › §42.05-2746 CFR §42.05-27Verified against eCFR.gov as of June 20, 2026View official text on eCFR.gov ↗Copy linkAs used in this subchapter, credential means any or all of the following:(a)Merchant mariner's document.(b)Merchant mariner's license.(c)STCW endorsement.(d)Certificate of registry.(e)Merchant mariner credential.