An engine officer or simply engineer, is a licensed mariner qualified and responsible for operating and maintaining the propulsion plants and support systems for a watercraft and its crew, passengers and cargo. Engineering officers are usually educated and qualified as engineering technicians.
The engine control room on the Argonaute, a French supply vessel, mainly used for anti-pollution missions along with the tugboat Abeille Bourbon. It has been built in 2003 in Norway, is based in Brest, belongs to SURF and is used by the French Navy.
A second engineer or first assistant engineer is a licensed member of the engineering department on a merchant vessel. This title is used for the person on a ship responsible for supervising the daily maintenance and operation of the engine department. They report directly to the chief engineer.
A sample of a credential given by the US Coast Guard to all officers, containing what vessels they are certified to work aboard