Combined diesel and diesel (CODAD) is a propulsion system for ships using two diesel engines to power a single propeller shaft.

System

A gearbox and clutches enable either of the engines or both of them together to drive the shaft. Two advantages over simply using a single, larger diesel engine of the same total power output are that (1) diesel engines have somewhat better specific fuel consumption at 75% to 85% max output than they do at only 50% output, and (2) there is a weight and size advantage to using two higher-speed engines compared to a single lower-speed engine, even with the slightly larger gearbox system.

CODAD vessels Passenger and Car Ferry Ships M/F Povl Anker

Containerships MV ACX Crystal

Coast Guard Offshore General-Purpose Cutters Iwami-class patrol vessel Shiretoko-class patrol vessel Tanjung Datu-class patrol vessel

Coast Guard Offshore Security Patrol Cutters Mizuho-class patrol vessel Ojika-class patrol vessel

Coast Guard Multi-mission Cutters Kunigami-class patrol vessel Teresa Magbanua-class patrol vessel

Coast Guard Interceptor Cutters Aso-class patrol vessel Hateruma-class patrol vessel Hida-class patrol vessel Anping-class cutter Tsurugi-class patrol vessel

Coast Guard Security Cutters Heritage-class cutter Mizuho (PLH-41) Shikishima-class patrol vessel

Patrol Corvettes / Navy OPVs Guaicamacuto-class patrol boat Kedah-class offshore patrol vessel

Corvettes Bung Karno-class corvette Bung Tomo-class corvette Diponegoro-class corvette Doha-class corvette Jacinto-class corvette Kasturi-class corvette Laksamana-class corvette Parchim-class corvette Steregushchiy-class corvette Tuo Chiang-class corvette Type 056 corvette

Frigates Formidable-class frigate Frégate de Défense et d'Intervention Jose Rizal-class frigate La Fayette-class frigate Lekiu-class frigate Maharaja Lela-class frigate Miguel Malvar-class frigate RN Type-31 Inspiration-class Tamandaré-class frigate Type 054A frigate

LSDs (landing ships, dock) Whidbey Island-class dock landing ship

LPDs (landing platforms, dock) Endurance-class landing platform dock Galicia-class landing platform dock Makassar-class landing platform dock Tarlac-class landing platform dock

Amphibious Flat-topped Ships Dokdo-class amphibious assault ship Ōsumi-class dock landing ship

FACs (fast attack-craft) Clurit-class fast attack craft Cyclone-class coastal patrol ship Sampari-class fast attack craft

Cruise Ships MV Piano Land (formerly MV Oriana)

References