LNG & ammonia fuel tanks
GTT
French licensor of membrane containment systems (Mark III, NO96) for LNG carriers and LNG fuel tanks on container ships, cruise ships and tankers.
Maritime Propulsion Companies
217 companies, page 4 of 10
Filter companies
Licensee engine builders
Guangzhou Diesel Engine Factory (GDF)
Chinese medium-speed marine engine maker and J-ENG UE two-stroke licensee with plants in Guangzhou and Jingjiang.
Waterjets
HamiltonJet
New Zealand waterjet pioneer making HJ, HM, HTX and LTX waterjets, AVX controls and hybrid jet propulsion for workboats, ferries and patrol craft.
Marine transmissions
Hangzhou Advance Gearbox Group
Chinese gearbox group making HC, GW and GC series marine reverse-reduction gearboxes from 10 kW to about 3,900 kW.
Licensee engine builders
Hanwha Engine
Korean licensee builder of low-speed two-stroke (Everllence B&W, WinGD) and four-stroke marine engines, formerly HSD Engine, part of Hanwha.
Fuel gas supply systems
Hanwha Ocean
Korean shipbuilder (Hanwha Group) that develops in-house fuel gas supply systems and multi-fuel tanks for LNG and ammonia-fuelled ships.
Commercial & workboat engines
HD Construction Equipment
HD Hyundai company whose engine division (ex-HD Hyundai Infracore/Doosan) builds 118–736 kW marine propulsion and generator diesels.
Electric motors & drives
HD Hyundai Electric
Korean maker of marine generators, propulsion motors, switchboards and battery systems, part of HD Hyundai.
Licensee engine builders
HD Hyundai Heavy Industries
Korean shipbuilder whose Engine & Machinery division builds B&W and WinGD two-stroke engines, HiMSEN four-strokes, propellers and FGSS.
Licensee engine builders
HD Hyundai Marine Engine
Changwon-based licensee builder of Everllence B&W two-stroke engines, turbochargers and crankshafts, formerly STX Heavy Industries.
Micro/SMR & floating nuclear plants
HD Korea Shipbuilding & Offshore Engineering (KSOE)
HD Hyundai's shipbuilding holding company, developing SMR-powered container ship designs and nuclear-electric propulsion with ABS.
Governors & engine control
Heinzmann
German supplier of digital and hydraulic governors, actuators and engine-management systems for marine diesel, gas and dual-fuel engines.
Licensee engine builders
Hengli Engine (Dalian)
Hengli Group subsidiary in Dalian building Everllence B&W two-stroke engines since 2024, with capacity of 180 engines a year.
Petrol outboards
Hidea
Hangzhou-based Chinese outboard maker producing carburettor and EFI four-stroke outboards from 2.5 to 150 hp, plus electric models.
Licensee engine builders
Hitachi Zosen Marine Engine (HZME)
Japanese licensee builder of Everllence B&W and WinGD low-speed marine engines, based at Ariake, Kumamoto.
Petrol outboards
Honda Marine
Marine division of Honda Motor Co. building four-stroke petrol outboards from 2.3 to 350 hp, with electric outboards in development.
Licensee engine builders
Hudong Heavy Machinery (HHM)
Shanghai-based CSSC Power subsidiary building WinGD and B&W two-stroke engines, incl. LNG, methanol, ethane and LPG dual-fuel types.
Controllable-pitch propellers
Hundested Propeller
Danish maker of custom controllable-pitch propeller systems with gearboxes, pitch controls and thrusters; part of BSI Group.
Azimuth thrusters
Hydromaster
Rotterdam maker of azimuth, retractable, high-speed and tunnel thrusters from 30 to 900 kW for workboats, ferries, yachts and inland vessels.
Marine gas turbines
IHI Corporation
Japanese heavy-industry group that builds GE LM2500-series gas turbines under licence, including units for JMSDF destroyers.
Engine designers & manufacturers
IHI Power Systems (Niigata)
IHI Group engine maker selling Niigata-brand medium-speed diesel, dual-fuel and ammonia engines, Z-Peller thrusters and gas turbines.
Inboard pleasure engines
Ilmor Marine
US maker of MV8 gasoline inboard and One-Drive sterndrive engines, sole engine supplier to MasterCraft, plus the ION electric outboard.
Inboard pleasure engines
Indmar Marine Engines
Tennessee maker of Ford-based gasoline inboard engines for tow-sports boats (Raptor series) and the EcoJet pontoon jet drive; part of Correct Craft.
Electric motors & drives
Ingeteam
Spanish power electronics group supplying INGEDRIVE marine converters and INDAR motors and generators for electric and hybrid vessels.