Air lubrication
Silverstream Technologies
London-based market leader in hull air lubrication; its Silverstream System is installed on more than 160 vessels.
Maritime Propulsion Companies
217 companies, page 8 of 10
Filter companies
Stern tube & shaft seals
SKF
Swedish bearing group whose Hamburg-based marine unit supplies Simplex stern tube seals, shaft-line bearings, OK couplings and fin stabilisers.
Leisure bow & stern thrusters
Sleipner Group
Norwegian maker of Side-Power bow and stern thrusters, Vector Fins stabilizers and steering for yachts and light commercial boats.
Rigid wing sails
Smart Green Shipping
Glasgow-based developer of the FastRig retractable rigid wingsail and FastRoute weather-routing software for bulkers and tankers.
Azimuth thrusters
Steerprop
Finnish azimuth propulsion maker from Rauma, specialising in ice-class and CRP propulsors; acquisition by Kongsberg agreed Sept 2026.
Distributors & propulsion integrators
Stewart & Stevenson
Houston-based Kirby Corporation company distributing and servicing mtu and Volvo Penta marine engines and power systems in the US.
Compact & small marine diesels
Steyr Motors
Austrian maker of compact high-power-density marine diesels (88-215 kW) for military boats, rescue craft, RIBs and workboats.
Licensee engine builders
STX Engine
Korean builder of Everllence-licensed marine engines and defence engines, based in Changwon and majority-owned by UAMCO.
Petrol outboards
Suzuki Marine
Marine division of Suzuki Motor Corporation making four-stroke outboards from 2.5 to 350 hp, including the dual-prop DF350A.
Naval nuclear reactors
TechnicAtome
French designer and builder of compact naval nuclear propulsion reactors for submarines and aircraft carriers.
Pump-jet thrusters
Tees White Gill Thrusters
UK maker of 360-degree azimuthing pump-jet thrusters for research, polar, naval and inland vessels; part of Tees Components since 2005.
Fixed-pitch propellers
Teignbridge Propellers
UK designer and manufacturer of CNC-machined marine propellers and complete sterngear for superyachts, leisure, commercial and military craft.
Fuel gas supply systems
TGE Marine Gas Engineering
Bonn-based engineering firm for gas carrier cargo handling, Type C tanks and LNG/ammonia fuel gas systems, owned by Mitsui E&S.
Engine designers & manufacturers
The Hanshin Diesel Works,
Kobe-based builder of low-speed four-stroke direct-drive marine diesels for Japanese coastal vessels, plus licensed small-bore two-strokes.
Electric motors & drives
The Switch
Finnish supplier of permanent-magnet shaft generators, propulsion motors and the DC-Hub power system for ships; part of BEMAC Group since 2024.
Shaft bearings
Thordon Bearings
Canadian maker of polymer water-lubricated propeller shaft and rudder bearings (COMPAC, SXL, XL), shaft seals and ThorShield coating.
Azimuth thrusters
Thrustmaster of Texas
Houston manufacturer of azimuth, tunnel, retractable and portable thrusters, T-Pod electric pods and US-built waterjets.
Stern tube & shaft seals
Tides Marine
Florida maker of drip-free SureSeal propeller shaft seals, rudder bearings and sail track systems for yachts and workboats.
Petrol outboards
Tohatsu
Tokyo-based outboard maker offering 2.5-250 hp four-stroke, two-stroke and electric outboards, and a longtime OEM supplier to other brands.
Electric outboards & inboards
Torqeedo
German electric boat drive maker owned by Yamaha Motor: Travel, Ultralight and Cruise outboards, pods, sail drives and Deep Blue high-voltage systems.
LTO cells & modules
Toshiba
Japanese maker of SCiB lithium-titanate (LTO) battery cells, modules and packs used by marine integrators in electric ferries and boats.
PEM fuel cells
Toyota
Japanese carmaker supplying Mirai-derived PEM fuel cell modules to marine integrators; 3rd-generation FC system announced for ships and other uses.
Surface drives
Twin Disc
US maker of marine transmissions, Arneson surface drives, Rolla propellers, Veth thrusters and joystick controls.
Marine gas turbines
UEC-Saturn
Rybinsk-based Rostec/UEC company that builds the M90FR and M70FRU marine gas turbines for Russian Navy ships.