A watertight tube through which the propeller shaft exits the hull at the stern of the vessel. The stern tube contains bearings to support the shaft and sealing systems to prevent seawater ingress while allowing the shaft to rotate freely.
Category: Marine Engineering
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LNG FuelLiquefied natural gas used as a marine fuel to power ship engines, offering significant reductions in sulphur oxides, nitrogen oxides, and particulate matter emissions compared to conventional heavy fuel oil.Main EngineThe primary propulsion machinery of a vessel, responsible for driving the propeller.ScrubberAn exhaust gas cleaning system (EGCS) installed on ships to remove sulphur oxides (SOx) and particulate matter from engine exhaust gases, enabling the use of high-sulphur fuel oil while meeting MARPOL Annex VI emission limits.Shaft GeneratorAn electrical generator driven by the main engine through the propeller shaft, used to produce electrical power while the vessel is at sea.Two-Stroke EngineA type of internal combustion engine that completes a power cycle in two strokes of the piston (one revolution of the crankshaft).Waste Heat RecoveryA system that captures thermal energy from the main engine's exhaust gases and cooling water to generate additional electrical power or steam.
Back to DictionaryEntry updated May 2026