Combined diesel and diesel

Combined marine propulsion
CODOG CODAG CODLAG CODAD COSAG COGOG COGAG COGAS CONAS IEP or IFEP

Principle of a CODAD propulsion system

Combined diesel and diesel (CODAD) is a propulsion system for ships using two diesel engines to power a single propeller shaft. A gearbox and clutches enable either of the engines or both of them together to drive the shaft.