Alfa Laval
Alfa Laval OceanGlide
Fluidic air lubrication creating an air layer under the flat bottom; the company cites up to 12% propulsion power savings.
Energy-saving devices & air lubrication products
19 products
Energy-saving devices: air lubrication, pre- and post-swirl ducts and fins, boss cap fins, high-efficiency rudders and steering gear.
Filter products: Energy-saving devices & air lubrication
Becker Marine Systems
Becker Mewis Duct
Pre-duct with integrated fins that improves propeller inflow on slow, full-form ships; installed on over 2,100 vessels.
Becker Marine Systems
Becker Twisted Fin
Duct and fin energy-saving device for slimmer, faster ships such as container vessels; installed on over 900 vessels.
Becker Marine Systems
Becker Rudders (Flap, Twist, Schilling)
Flap, twisted and high-lift fishtail rudders for better manoeuvrability, reduced cavitation and propulsion efficiency.
Becker Marine Systems
Becker Rotary Vane Steering Gear
Low-pressure hydraulic rotary vane steering gear with integrated bearings, 160–500 kNm, for smaller vessels.
Jastram Engineering
Jastram Engineering steering systems
Custom hydraulic steering systems for vessels of 15-220 m by Jastram Engineering (North Vancouver, Canada).
Kongsberg Maritime
Promas propulsion & manoeuvring system
Energy-saving integration of propeller, costa bulb, hub cap and twisted rudder; 3–8% saving claimed on single-screw ships.
Kongsberg Maritime
Tenfjord steering gear (divested)
Rotary vane steering gear formerly sold by Kongsberg; the steering gear and rudder business was sold in 2024 to Norvestor and now trades as Neuver Maritime.
Kongsberg Maritime
Flap / high-lift rudders (divested)
High-lift rudders formerly sold by Kongsberg; the rudder business was transferred to Neuver Maritime (Norvestor) in 2024–25.
Mitsubishi Heavy Industries
MALS (Mitsubishi Air Lubrication System)
Blows a layer of air bubbles under the flat hull bottom to cut frictional resistance; over 5% fuel saving measured on a ferry.
MOL Techno-Trade (PBCF)
PBCF (Propeller Boss Cap Fins)
Finned propeller cap that breaks up the hub vortex; about 3–5% fuel/CO2 saving claimed, over 4,500 ships fitted, retrofittable.
Samsung Heavy Industries
SAVER Air
Shipyard-developed air lubrication system fitted to SHI-built LNG carriers, container ships and tankers to reduce hull friction.
Schneekluth Hydrodynamik
Schneekluth Wake Equalizing Duct (WED)
Pair of foil-profiled half-ring ducts ahead of the propeller that even out inflow; the company claims up to 12% fuel and 50% vibration reduction.
Silverstream Technologies
Silverstream System
Microbubble air carpet under the flat bottom; 5–10% net fuel savings claimed; newbuild or ~10-day retrofit.
Van der Velden Marine Systems
Van der Velden rudder systems
Flap, fishtail, flanking and energy-saving rudders for inland, seagoing, dredging and fishing vessels; Barke reaches a combined 100-degree angle.
Van der Velden Marine Systems
Van der Velden steering gear
Hydraulic steering systems for single-screw twin-rudder (2DWK) and four-rudder (4DWKK) inland vessels, class-approved.
Wärtsilä
Wärtsilä EnergoFlow
Pre-swirl stator fins ahead of the propeller; about 2–7% savings, project-specific.
Wärtsilä
Wärtsilä EnergoProFin
Boss cap fins recovering hub-vortex energy; about 2% typical savings, up to 5%.
Wärtsilä
Wärtsilä EnergoPac
Propeller and rudder with bulb designed as one unit; about 2–9% power savings at trial speed.