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 "Safety valve"
Why won't my marine air compressor build pressure?
A first-principles check for a compressor that runs but won't build pressure — valves, unloader, leaks, rings and cooling.
Marine MachineryHow does a marine boiler work?
A marine boiler generates steam by transferring heat to water — this covers the working principle and the difference between oil-fired and exhaust-gas boilers.
Marine MachineryHow does a marine air compressor work and why is it needed?
A marine air compressor squeezes air in stages to high pressure and stores it in receivers, chiefly to provide the starting air that turns large diesel engines over.
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 OperationsWhat is a toolbox talk and when is it done?
What a toolbox talk is, when it happens before shipboard work, and how it turns the risk assessment and permit into a shared plan.
Shipboard OperationsHow do I prepare for a Port State Control inspection?
How to be ready for Port State Control — certificates, drills, maintenance evidence and housekeeping — so a routine inspection does not become a detention.
Marine MachineryWhy won't the main engine start on air?
A main engine that turns on air but will not fire, or will not turn at all, points to a short list of common causes across the starting-air, fuel and control systems.
Shipboard OperationsWhat is a Shipboard Oil Pollution Emergency Plan (SOPEP)?
SOPEP is the Shipboard Oil Pollution Emergency Plan, a MARPOL-required plan that tells the crew how to report and respond to an oil spill from the ship.
Marine MachineryWhat is the emergency procedure if the steering gear fails?
Steering gear failure is a serious emergency handled by switching to the standby power unit or emergency steering and warning other ships, backed by SOLAS redundancy.
Shipboard OperationsWhat is a near miss on a ship and why is reporting it important?
A near miss is an event that could have caused injury, damage or pollution but happened not to — reporting them lets a ship correct hazards before they cause a real accident.
