Combined diesel and diesel

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

Principle of a CODAD propulsion system

System

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

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

Coast Guard Offshore Patrol Cutters

• Iwami-class patrol vessel
• Tanjung Datu-class patrol vessel

Coast Guard Offshore Security Patrol Cutters

• Mizuho-class patrol vessel
• Ojika-class patrol vessel

Coast Guard General-Purpose 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
• 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 Tomo-class corvette
• Doha-class corvette
• Kasturi-class corvette
• Laksamana-class corvette
• Malvar-class corvette
• Steregushchiy-class corvette
• Type 056 corvette

Frigates

• Formidable-class frigate
• Frégates de taille intermédiaire
• 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

Cruise Ships

• MV Piano Land (formerly MV Oriana)