- (a) For all original and raise of grade of engineer endorsements, at least one-third of the minimum service requirements must have been obtained on the particular mode of propulsion for which the applicant seeks endorsement.
(b) If an applicant desires to add a propulsion mode (steam, motor, or gas turbine) to their endorsement while holding an MMC officer endorsement in that grade, the following alternatives are acceptable:
- (1) Four months of service as an observer on vessels of the new propulsion mode.
- (2) Four months of service as an engineer officer at the operational level on vessels of the new propulsion mode.
- (3) Six months of service as Oiler, Boiler Technician/Watertender, or Junior Engineer on vessels of the new propulsion mode.
- (4) Completion of a Coast Guard-approved training course for this endorsement.
[USCG-2004-17914, 78 FR 77909, Dec. 24, 2013, as amended by USCG-2021-0097, 89 FR 93092, Nov. 25, 2024; USCG-2021-0834, 89 FR 102336, Dec. 17, 2024]