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Lubricating oil is often called the “blood of an engine.” On ships, this comparison is especially appropriate because the main engine may operate continuously for days or even weeks. During this time, the lubricating oil must maintain the correct viscosity, remain clean, remove heat, reduce friction, and protect critical engine components. A problem with lubrication can quickly become a serious engine-room issue, leading to bearing damage, excessive cylinder liner wear, pisto

Learn ship dimensions and hull terminology including LOA, LBP, LWL, beam, draught, freeboard, camber, sheer, flare, tumblehome, DWT and more in this simple marine engineering guide.

Electrical motors are among the most important machines found onboard a modern ship. From pumps and fans to cranes, winches, windlasses, steering systems and other auxiliary machinery, electric motors provide the mechanical power required for reliable shipboard operation.

Valves are among the most important components in any fluid-handling system. They are used to control, regulate, isolate, direct, and, in certain applications, protect systems from excessive pressure. Onboard ships, valves are found throughout essential systems such as seawater cooling, freshwater, fuel oil, lubricating oil, steam, compressed air, fire-fighting, bilge, ballast, and hydraulic systems.

Learn how fresh water generators work on ships, including distillation, reverse osmosis, components, operation, maintenance, scale control, and water treatment.

Learn everything about fuel injectors in marine diesel engines, construction, working principle, atomization, swirl, penetration, cooling, maintenance, and modern emission-control designs, explained in simple English for MEO Class 4 students and cadets.

Learn how marine diesel engine cooling systems work, from air vs. water cooling to central cooling, piston cooling, bore cooling, and the cooling water treatment limits every marine engineer should know.