A third engineer or second assistant engineer is a rank of engine officer who is part of the engine department on a ship.

Third engineer
General
Other namesSecond assistant engineer
DepartmentEngineering Department
Reports toChief engineer, second engineer
LicensedYes
Dutiesdaily maintenance and operation in the engine department
RequirementsSea Time on Previous License, Professional Training.
Watchstanding
WatchstanderDepends on manned or unmanned engine room
Watch (at sea)Varies (0000-0400, 1200-1600)
Watch (in port)Varies (0000-0800)

The third engineer is usually in charge of boilers, auxiliary engines, condensate and feed systems, record keeping of chemicals onboard, lube oil tests, and is the third most senior engine officer on board.

The exact duties of this position will often depend upon the type of ship and arrangement of the engine department. On ships with steam propulsion plants the Second or Third is in charge of the boilers, combustion control, soot blowers, condensate and feed equipment, feed pumps, fuel, and condensers. On diesel and gas turbine propulsion plants the Third is in charge of auxiliary boilers, auxiliary engines.

Notable Second assistant engineers

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  • International Maritime Organization (1995) [1978]. "III: Standards Regarding the Engine Department". International Convention on Standards of Training, Certification and Watchkeeping for Seafarers, 1978. Section A–III/1.
  • International Labour Organization (2000-12-05). "Ship-Engineer (Machinist)". International Hazard Datasheets on Occupation. Retrieved 2007-05-26.