Maritime Knowledge Base
Browse questions and answers across marine machinery, merchant navy careers, shipboard operations and maritime glossary terms.
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14 topic clusters
Marine Machinery
Troubleshooting guides for pumps, boilers, purifiers, compressors and auxiliary systems.
Main EngineAuxiliary EnginesPumps
Browse topics12 topic clustersMerchant Navy Careers
Questions about joining the merchant navy, exams, cadetships, ranks and sea-time.
How to JoinEligibilityEntrance Exams
Browse topics16 topic clustersMaritime Glossary
Plain-English definitions of shipping, engine-room, navigation and regulatory terms.
Engine-room TermsDeck TermsNavigation Terms
Browse topics12 topic clustersShipboard Operations
Practical Q&A for watchkeeping, safety, maintenance routines and onboard documentation.
WatchkeepingSafety DrillsLogbooks & Records
Browse topicsResults for "Lightship"
Maritime Glossary
What is deadweight tonnage (DWT)?
Deadweight tonnage defined — the total weight a ship can carry — and how it differs from displacement and gross tonnage.
Shipboard OperationsWhat is a draught survey and how is cargo weight calculated?
A draught survey determines the weight of bulk cargo loaded or discharged by measuring the ship's draughts and calculating the change in its displacement.
