propulsion system: COGOG

propulsion systems
Naval Engine
engines

Combined gas or gas (COGOG) is a type propulsion system using only gas turbine engines.

A high efficiency, low output turbine is used for cruising speeds with a high output turbine being used for high-speed operations. A clutch allows either turbine to be selected, but there is no gearbox to allow operation of both turbines at once.

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1972	Destroyer Iroquois class	1
1974	Frigate Type 21 Amazon class	1
1975	Guided-Missile Frigate Tromp class	1
1975	Guided-Missile Destroyer Type 42 (Batch 1 and 2) class	2
1975	Destroyer Spruance class	2
1978	Frigate Kortenaer class	1
1979	Frigate Type 22 (Batch 1) Broadsword class	2
1981	Guided-Missile Destroyer Kidd class	2
1982	Guided-Missile Cruiser Project 1164 Atlant class	2
1982	Destroyer Hatsuyuki class	2
1983	Frigate Type 22 (Batch 2) Boxer class	2
1983	Guided-Missile Cruiser Ticonderoga class	2

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Canadian Armed Forces
Royal Navy
Pakistan Navy
US Navy
Royal Netherlands Navy
Japanese Navy
Russian Navy
Chilean Navy

propulsion system: COGOG

Used by

In Service