---- Naval Engine classes ---- .. diesel-electric .. nuclear - pressurised water reactor .. propulsion system: CODAD .. propulsion system: CODLAG .. propulsion system: COSAG .. propulsion systems -- .. propulsion system: CODLOG -- .. boilers -- .. diesel -- .. electric motors -- .. gas turbine -- .. propulsion system: CODAG -- .. propulsion system: CODOG -- .. propulsion system: COGAG -- .. propulsion system: COGOG -- .. steam turbines CH .. gas turbine - Brown Boveri & Cie DE .. diesel - MAN 12RK 280 DE .. diesel - MAN 12V 32/40 DE .. diesel - MAN 16V 32/40 DE .. diesel - MTU DE .. diesel - MTU 16V 1163 DE .. diesel - MTU 20V 4000 DE .. diesel - Sulzer 12V ZA40S DE .. MTU 20V-956-TB92 FI .. diesel - Wartsila Nohab 16V25 FI .. diesel - Wärtsilä VASA32 FI .. propulsion system: CODLAD FR .. diesel - Pielstick 16PA6V-280STC FR .. diesel - SEMT Pielstick IT .. diesel - Grandi Motori Trieste BL-230-20-DVM JP .. propulsion system: COGLAG NL .. diesel - electric Stork Wartsila 12SW28 NL .. diesel - Stork Werkspoor NL .. diesel - Werkspoor Wartsila 16V26 NL .. electric HOLEC UA .. gas turbine - Zorya Mashproekt DS-71 UA .. gas turbine - Zorya Mashproekt DT-59 UK .. diesel - electric Paxman 12YJCZ UK .. diesel - Paxman A12YHAXZ UK .. diesel - Paxman Valenta 12CM UK .. diesel - Ruston RK270 UK .. gas turbine - Rolls Royce MT30 UK .. gas turbine - Rolls Royce Olympus UK .. gas turbine - Rolls Royce Spey UK .. gas turbine - Rolls Royce Tyne UK .. gas turbine - Rolls Royce WR21 US .. diesel - Caterpillar 3616 US .. diesel - FM Colt-Pielstick PA6B STC US .. gas turbine - Allison 570 US .. gas turbine - General Electric LM2500 US .. gas turbine - Pratt & Whitney FT4A --More-- ---- International classes ---- Guided-Missile Destroyer ............ CNGF class Frigate ............ FREMM class Corvette ............ Patrulleros de Zona MarItima Others ............ Conservation Floating Production Storage and Offloading ............ FPSO class Drill Ship ............ Drillship Platform Supply Vessel ............ Platform supply vessel ---- More ----
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.