National officer endorsement
National officer endorsement means an annotation on an MMC that allows a mariner to serve in the capacities listed in 10.109 of this part. The officer endorsement serves as the license and/or certificate of registry pursuant to 46 U.S.C. subtitle II part E.
46 CFR § 10.107
With respect to part 16 of this subchapter only, if the definitions in paragraph (b) of this section differ from those set forth in 16.105, the definition set forth in 16.105 applies.