Maritime Knowledge Base
Browse questions and answers across marine machinery, merchant navy careers, shipboard operations and maritime glossary terms.
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Marine Machinery
Troubleshooting guides for pumps, boilers, purifiers, compressors and auxiliary systems.
Merchant Navy Careers
Questions about joining the merchant navy, exams, cadetships, ranks and sea-time.
Maritime Glossary
Plain-English definitions of shipping, engine-room, navigation and regulatory terms.
Shipboard Operations
Practical Q&A for watchkeeping, safety, maintenance routines and onboard documentation.
Results for "Corrosion"
What is a central cooling system on a ship and why is it used?
A central cooling system uses seawater to cool a closed freshwater circuit, which in turn cools the machinery — reducing seawater corrosion and fouling in the equipment.
Marine MachineryWhy is boiler water treated on a ship and how?
Boiler water is chemically treated and tested to prevent scale, corrosion and carryover, which would damage the boiler, reduce its efficiency and threaten safety.
Shipboard OperationsWhy are enclosed spaces on ships so dangerous?
Enclosed spaces kill because their atmosphere can be oxygen-deficient, toxic or flammable with no outward sign — and rescuers who rush in become the next victims.
Marine MachineryWhat is cylinder lubrication in a two-stroke marine engine?
Cylinder lubrication is the separate oil supply fed onto the liner of large two-stroke engines to lubricate, neutralise fuel acids and keep the surfaces clean.
Marine MachineryWhat is jacket cooling water in a marine engine?
Jacket cooling water is the treated fresh water circulated through the passages, or jackets, around an engine's cylinders to carry away combustion heat and keep it at its correct working temperature.
Marine MachineryHow does a marine heat exchanger work?
A heat exchanger transfers heat from one fluid to another through a dividing wall without letting them mix — used all over a ship to cool engines, oil and air.
