Maritime Encyclopedia
India's first comprehensive Merchant Navy knowledge base. Terminology, regulations, and practical knowledge for Indian seafarers — built from real sea experience.
Abaft
Toward or at the stern
Maritime TerminologyAbandon Ship - Maritime Professional Guide
Emergency evacuation of vessel when sinking or severe casualty - Complete examination guide for IMU-CET and DG Shipping CoC
Maritime TerminologyAbeam
At right angles to ship centerline
Maritime TerminologyAbeam - Complete Maritime Guide
Perpendicular to ship centerline 90 degrees from side - Comprehensive guide for IMU-CET and DG Shipping CoC examinations
Maritime TerminologyAble Seaman - Maritime Professional Guide
Experienced deck rating qualified watchkeeping duties - Complete examination guide for IMU-CET and DG Shipping CoC
Maritime TerminologyAccommodation - Complete Maritime Guide
Living quarters for crew and passengers including cabins facilities - IMU-CET and DG Shipping CoC examination guide for Indian seafarers
Maritime TerminologyAframax Tanker
A crude oil tanker with deadweight tonnage between 80,000 and 120,000 DWT, sized to transit the AFRA maximum rate category — common in short-haul crude trades
Maritime TerminologyAft - Complete Maritime Guide
Direction toward stern rear end of vessel - Comprehensive guide for IMU-CET and DG Shipping CoC examinations
Maritime TerminologyAft of Beam
Between abeam and stern position
Maritime TerminologyAground vs Grounded - Maritime Terms Explained
Accidental versus intentional bottom contact - Clear distinction for exam success
Maritime TerminologyAhead - Complete Maritime Guide
In front of ship in direction of heading - Comprehensive guide for IMU-CET and DG Shipping CoC examinations
Maritime TerminologyAir Compressor
Compressed air generation
Maritime TerminologyAIS - Complete Maritime Guide
Automatic Identification System broadcasting ship position information - IMU-CET and DG Shipping CoC examination guide for Indian seafarers
Maritime TerminologyAldis Lamp - Complete Maritime Communication Guide
Hand-held signal lamp for ship-to-ship visual communication - Comprehensive guide for Indian seafarers covering IMU-CET and DG Shipping CoC examinations
Maritime TerminologyAloft
Above deck in rigging or mast
Maritime TerminologyAloft - Complete Maritime Guide
Above deck in rigging or superstructure upward direction - Comprehensive guide for IMU-CET and DG Shipping CoC examinations
Maritime TerminologyAmidships
In the middle of the ship
Maritime TerminologyAmidships - Complete Maritime Guide
Center portion midway between bow and stern - Comprehensive guide for IMU-CET and DG Shipping CoC examinations
Maritime TerminologyAnchor Watch
A continuous duty watch kept on a vessel at anchor to monitor position drift, weather changes, and traffic — typically a single officer on the bridge
Maritime TerminologyAnchoring - Comprehensive Maritime Guide
Securing ship using anchor for temporary stationary position - Essential knowledge for IMU-CET and DG Shipping CoC examinations
Maritime TerminologyAngle of Loll - Ship Motion Analysis
Equilibrium angle when zero metacentric height - Understanding ship dynamics for safe operations
Maritime TerminologyAntifouling Paint
Specialized marine paint applied to a vessel's hull below the waterline to prevent growth of barnacles, algae, and other organisms that increase drag
Maritime TerminologyARPA - Complete Maritime Guide
Automatic Radar Plotting Aid processing radar targets collision avoidance - IMU-CET and DG Shipping CoC examination guide for Indian seafarers
Maritime TerminologyArrest of Ship
A legal remedy allowing a creditor to detain a ship in port through court order to secure maritime claims — covered under Indian Admiralty Act 2017
Maritime TerminologyAsphyxiation Hazard
A major shipboard risk in enclosed spaces where oxygen depletion or toxic gas buildup causes rapid incapacitation — requires atmospheric testing before entry
Maritime TerminologyAstern - Complete Maritime Guide
Behind ship in direction opposite to heading - Comprehensive guide for IMU-CET and DG Shipping CoC examinations
Maritime TerminologyAstern Direction
Behind the ship toward stern
Maritime TerminologyAthwartships
Across the ship from side to side
Maritime TerminologyAthwartships - Complete Maritime Guide
Direction across ship side to side perpendicular centerline - Comprehensive guide for IMU-CET and DG Shipping CoC examinations
Maritime TerminologyAuxiliary Engine
Generator electrical power
Maritime TerminologyBallast Exchange - Maritime Professional Guide
Replacing ballast water at sea for environmental compliance - Complete examination guide for IMU-CET and DG Shipping CoC
Maritime TerminologyBallast Water Management
The regulation and treatment of water taken into ship tanks for stability, governed by IMO BWM Convention 2004 to prevent invasive species transfer
EncyclopediaBallast Water Treatment (BWM Convention)
The Ballast Water Management Convention requires ships to treat ballast water before discharge to prevent invasive species. Learn the D-1 and D-2 standards and seafarer obligations.
Maritime TerminologyBallasting - Comprehensive Maritime Guide
Loading water for stability draft and trim adjustment - Essential knowledge for IMU-CET and DG Shipping CoC examinations
Maritime TerminologyBareboat Charter
A ship hire arrangement where the charterer assumes full operational, manning, and maintenance responsibility — also called a demise charter
Maritime TerminologyBeam vs Breadth - Maritime Terms Explained
Maximum width versus general width term - Clear distinction for exam success
Maritime TerminologyBeaufort Scale - Complete Maritime Guide
Wind force classification system 0-12 measuring wind strength - Comprehensive guide for IMU-CET and DG Shipping CoC examinations
Maritime TerminologyBelow Deck
Beneath the main deck level
Maritime TerminologyBerth Location - Maritime Guide
Ship's designated mooring position - Professional knowledge for maritime careers
Maritime TerminologyBerth vs Pier - Maritime Terms Explained
Mooring location versus structure - Clear distinction for exam success
Maritime TerminologyBerthing - Comprehensive Maritime Guide
Bringing ship alongside dock or berth for cargo operations - Essential knowledge for IMU-CET and DG Shipping CoC examinations
Maritime TerminologyBilge Alarm
An automated sensor that detects rising water levels in ship bilges, triggering an alert to prevent flooding of machinery spaces
Maritime TerminologyBilge Pump
Bilge water removal pump
Maritime TerminologyBill of Lading
Cargo receipt and contract
Maritime TerminologyBiofouling
Accumulation of marine organisms including algae, barnacles, and mussels on a vessel's underwater hull, increasing drag and fuel consumption significantly
Maritime TerminologyBitts - Maritime Encyclopedia
Pair of vertical posts for securing mooring lines or anchor chains under heavy loads - Complete guide for Indian seafarers covering IMU-CET and DG Shipping CoC examinations
Maritime TerminologyBlock Coefficient - Ship Calculation Guide
Measure of hull fullness form efficiency - Technical guide for IMU-CET and DG Shipping CoC calculations
Maritime TerminologyBoiler
Steam generation equipment
Maritime TerminologyBollard - Maritime Encyclopedia
Strong vertical post on deck for securing mooring lines during berthing operations - Complete guide for Indian seafarers covering IMU-CET and DG Shipping CoC examinations
Maritime TerminologyBosun - Maritime Professional Guide
Boatswain deck crew supervisor leading rating - Complete examination guide for IMU-CET and DG Shipping CoC
Maritime TerminologyBow - Complete Maritime Guide
Front pointed forward end of vessel - Comprehensive guide for IMU-CET and DG Shipping CoC examinations
Maritime TerminologyBreak Bulk Cargo
Individual packaged cargo pieces
Maritime TerminologyBridge - Complete Maritime Guide
Navigation and command center elevated position for ship control - IMU-CET and DG Shipping CoC examination guide for Indian seafarers
Maritime TerminologyBulk Carrier - Maritime Professional Guide
Dry bulk commodity transport ship ore grain coal - Complete examination guide for IMU-CET and DG Shipping CoC
Maritime TerminologyBulkhead - Maritime Encyclopedia
Vertical partition dividing ship into watertight compartments for structural strength and safety - Complete guide for Indian seafarers covering IMU-CET and DG Shipping CoC examinations
Maritime TerminologyBunker Survey - Maritime Professional Guide
Fuel quantity verification measurement during bunkering operations - Complete examination guide for IMU-CET and DG Shipping CoC
Maritime TerminologyBunkering - Comprehensive Maritime Guide
Refueling ship operations taking on fuel oil and lubricants - Essential knowledge for IMU-CET and DG Shipping CoC examinations
Maritime TerminologyBunkering Procedure
The regulated process of supplying fuel oil to a vessel from barge, shore pipeline, or another ship — requires oil spill contingency plan under MARPOL
Maritime TerminologyCable - Complete Maritime Guide
One-tenth nautical mile approximately 185.2 meters distance - Comprehensive guide for IMU-CET and DG Shipping CoC examinations
Maritime TerminologyCable Length
Distance equal to 0.1 nautical miles
Maritime TerminologyCapsizing Moment - Ship Motion Analysis
Moment causing ship to overturn - Understanding ship dynamics for safe operations
Maritime TerminologyCapstan - Maritime Encyclopedia
Vertical rotating drum machinery for hauling anchor chain or mooring lines - Complete guide for Indian seafarers covering IMU-CET and DG Shipping CoC examinations
Maritime TerminologyCargo Discharge - Comprehensive Maritime Guide
Unloading cargo operations from vessel at port - Essential knowledge for IMU-CET and DG Shipping CoC examinations
EncyclopediaCargo Hold Inspection
Cargo hold inspection is the assessment of a ship's holds for cleanliness, structural integrity, and fitness for intended cargo before loading. Learn the inspection process and standards.
Maritime TerminologyCargo Loading - Comprehensive Maritime Guide
Loading cargo operations stowage securing on vessel - Essential knowledge for IMU-CET and DG Shipping CoC examinations
Maritime TerminologyCargo Manifest
Official document listing all cargo aboard a vessel including quantity, description, origin, destination, and shipper details — required by port authorities
Maritime TerminologyCargo Securing
Fastening cargo to prevent movement
Maritime TerminologyCDC
Continuous Discharge Certificate
Maritime TerminologyCentre of Buoyancy - Ship Calculation Guide
Point where buoyancy force acts upward - Technical guide for IMU-CET and DG Shipping CoC calculations
Maritime TerminologyCentre of Gravity - Ship Calculation Guide
Point where ship's weight concentrated - Technical guide for IMU-CET and DG Shipping CoC calculations
Maritime TerminologyCertificate of Competency
License to serve in rank
Maritime TerminologyCertificate of Competency
A DG Shipping qualification confirming a seafarer has met training, knowledge, and sea service standards for a specific rank — issued under STCW Convention
Maritime TerminologyChain Locker - Maritime Encyclopedia
Below-deck storage compartment for anchor chain with drainage and ventilation - Complete guide for Indian seafarers covering IMU-CET and DG Shipping CoC examinations
Maritime TerminologyCharter Party
A formal contract between a shipowner and charterer specifying terms of vessel hire — types include voyage charter, time charter, and bareboat charter
Maritime TerminologyChemical Tanker
A vessel designed to carry bulk liquid chemicals in specialized stainless steel or coated tanks with high corrosion resistance and cargo segregation systems
Maritime TerminologyChief Engineer - Maritime Professional Guide
Head of engine department machinery operations - Complete examination guide for IMU-CET and DG Shipping CoC
Maritime TerminologyChief Mate
The officer second-in-command to the Master, responsible for cargo operations, stability calculations, deck maintenance, and safety management system oversight
Maritime TerminologyChief Officer - Maritime Professional Guide
First mate second-in-command deck department head - Complete examination guide for IMU-CET and DG Shipping CoC
Maritime TerminologyClean Bill of Lading
A bill of lading issued without any clauses noting damage to goods or packaging — required by most letters of credit in international trade
Maritime TerminologyCofferdam
A narrow empty void space between two watertight bulkheads providing isolation between cargo tanks, fuel tanks, or ballast spaces to prevent contamination
Maritime TerminologyCofferdam - Maritime Guide
Empty space separating compartments for safety - Professional knowledge for maritime careers
Maritime TerminologyCollision - Maritime Professional Guide
Two vessels striking each other causing damage requiring investigation - Complete examination guide for IMU-CET and DG Shipping CoC
Maritime TerminologyCOLREG - Maritime Professional Guide
Collision Regulations navigation rules preventing collisions at sea - Complete examination guide for IMU-CET and DG Shipping CoC
Maritime TerminologyCOLREGS
International Regulations for Preventing Collisions at Sea 1972 — the maritime traffic code governing vessel movement, navigation lights, fog signals, and right-of-way rules
Maritime TerminologyCompass Error
The total angular difference between compass north and true north — the combined result of magnetic variation (Earth's field) and deviation (ship's own magnetism)
Maritime TerminologyConfined Space Entry Permit
A mandatory documented authorization required before entering any enclosed or confined space onboard where asphyxiation or toxic exposure risks exist
Maritime TerminologyContainer Bay
Vertical container storage section
Maritime TerminologyContainer Row
Fore-aft container line
Maritime TerminologyContainer Ship - Maritime Professional Guide
Cargo vessel carrying standardized shipping containers - Complete examination guide for IMU-CET and DG Shipping CoC
Maritime TerminologyContainer Slot
A single unit of ship capacity sized to accept one 20-foot equivalent unit (TEU) — basis for freight rate calculations and vessel capacity measurement
Maritime TerminologyContainer Tier
Horizontal container layer
Maritime TerminologyConvention vs Protocol - Maritime Terms Explained
Primary treaty versus amendment document - Clear distinction for exam success
Maritime TerminologyCourse vs Heading - Maritime Terms Explained
Intended direction versus actual direction - Clear distinction for exam success
Maritime TerminologyCrew Agreement
A legally binding employment contract between seafarers and employer specifying wages, leave, hours, and conditions — mandatory under MLC 2006 for all vessels
Maritime TerminologyCrude Oil Washing (COW) — What It Means on Tankers
Crude oil washing definition for seafarers. How COW works on crude tankers, MARPOL requirements, and why it's safer than water washing.
Maritime TerminologyCruise Ship - Maritime Professional Guide
Passenger tourism vessel recreational voyages - Complete examination guide for IMU-CET and DG Shipping CoC
Maritime TerminologyCurrent - Complete Maritime Guide
Horizontal water movement affecting navigation and fuel consumption - Comprehensive guide for IMU-CET and DG Shipping CoC examinations
Maritime TerminologyCustoms Clearance - Maritime Guide
Import export formalities at port - Professional knowledge for maritime careers
Maritime TerminologyDamage Stability
The ability of a vessel to remain afloat and upright after flooding of one or more compartments — regulated under SOLAS Chapter II-1
Maritime TerminologyDangerous Goods Declaration
A shipper-provided document classifying hazardous cargo under IMDG Code, specifying the UN number, class, packing group, and emergency procedures
Maritime TerminologyDavit — What It Means on Ships
Davit definition for seafarers. Types of davits on ships, how they work, and their role in launching lifeboats and rescue boats.
Maritime TerminologyDe-ballasting - Comprehensive Maritime Guide
Discharging ballast water for cargo loading draft increase - Essential knowledge for IMU-CET and DG Shipping CoC examinations
Maritime TerminologyDead Reckoning
A navigation method of estimating current position based on last known position, speed, course, and elapsed time — used when GPS is unavailable
Maritime TerminologyDeadweight Tonnage - Ship Calculation Guide
Maximum weight ship can carry cargo fuel stores - Technical guide for IMU-CET and DG Shipping CoC calculations
Maritime TerminologyDeck Log
The official chronological record on the bridge documenting navigational decisions, weather conditions, course changes, communications, and significant events
Maritime TerminologyDeck Plating - Maritime Guide
Steel plates forming deck surface - Professional knowledge for maritime careers
Maritime TerminologyDemurrage
Compensation payable by a charterer when a vessel is detained beyond the agreed laytime for loading or discharging — a daily rate specified in the charter party
EncyclopediaDemurrage (Maritime)
Demurrage is the charge paid by a charterer to a shipowner for exceeding the agreed laytime for cargo operations. Learn how it is calculated and its operational implications.
Maritime TerminologyDerrick Crane - Maritime Guide
Cargo lifting boom on ship - Professional knowledge for maritime careers
Maritime TerminologyDisplacement - Ship Calculation Guide
Weight of water displaced by floating ship - Technical guide for IMU-CET and DG Shipping CoC calculations
Maritime TerminologyDisplacement Tonnage
The total weight of a vessel calculated as the weight of water displaced — measured in light condition and loaded condition in metric tonnes
Maritime TerminologyDisplacement vs Deadweight - Maritime Terms Explained
Total weight versus cargo capacity - Clear distinction for exam success
Maritime TerminologyDistress Signals - Complete Maritime Communication Guide
Visual and audio signals indicating vessel in emergency - Comprehensive guide for Indian seafarers covering IMU-CET and DG Shipping CoC examinations
Maritime TerminologyDolphin - Maritime Guide
Isolated mooring post in water - Professional knowledge for maritime careers
EncyclopediaDoppler Log
A Doppler log is a navigation instrument that measures a ship's speed and distance over the ground or through water using sound wave reflection. Learn how it works and its use in navigation.
Maritime TerminologyDouble Bottom - Maritime Guide
Space between outer inner bottom plating - Professional knowledge for maritime careers
Maritime TerminologyDraft - Maritime Encyclopedia
Vertical distance from waterline to lowest point of keel indicating ship immersion depth - Complete guide for Indian seafarers covering IMU-CET and DG Shipping CoC examinations
Maritime TerminologyDraft Survey
A cargo calculation method measuring vessel draft before and after loading to determine cargo weight — the standard measurement method for bulk cargo
Maritime TerminologyDraft vs Depth - Maritime Terms Explained
Ship immersion versus available water depth - Clear distinction for exam success
Maritime TerminologyDredger - Maritime Professional Guide
Seabed excavation vessel harbor channel maintenance - Complete examination guide for IMU-CET and DG Shipping CoC
EncyclopediaDry Bulk Cargo Hazards
Dry bulk cargoes carry unique hazards including liquefaction, self-heating, oxygen depletion, and toxic gas emission. Learn the main risks and safety precautions for bulk carrier crews.
Maritime TerminologyDry Bulk Carrier
A vessel designed to carry unpackaged dry commodities — grain, coal, iron ore, fertilizers — in large open holds loaded by conveyor or crane
Maritime TerminologyDrydocking - Maritime Professional Guide
Vessel maintenance and repair in dry dock facility without water - Complete examination guide for IMU-CET and DG Shipping CoC
Maritime TerminologyDunnage
Protective material under and around cargo
Maritime TerminologyECDIS - Complete Maritime Guide
Electronic Chart Display Information System digital navigation charts - IMU-CET and DG Shipping CoC examination guide for Indian seafarers
Maritime TerminologyEcho Sounder - Complete Maritime Guide
Depth measuring equipment using sound waves water depth determination - IMU-CET and DG Shipping CoC examination guide for Indian seafarers
Maritime TerminologyEEBD
Emergency Escape Breathing Device
Maritime TerminologyEnclosed Space Entry - Maritime Professional Guide
Entering confined space requiring safety permits and procedures - Complete examination guide for IMU-CET and DG Shipping CoC
Maritime TerminologyEnclosed Space Rescue
Emergency extraction procedure for incapacitated persons inside tanks or enclosed spaces — requires trained two-person standby team and personal protective equipment
Maritime TerminologyEngine Room Simulator
A computer-based training system that replicates ship engine room operations — used for DG Shipping training and STCW watchkeeping competency assessment
Maritime TerminologyEPIRB - Comprehensive Maritime Guide
Emergency Position Indicating Radio Beacon distress alerting device - Essential knowledge for IMU-CET and DG Shipping CoC examinations
Maritime TerminologyEquator Crossing Ceremony
A maritime tradition where first-time equator crossers undergo an initiation — no hazing or safety violations permitted under MLC 2006 anti-harassment provisions
Maritime TerminologyFairlead - Maritime Encyclopedia
Fitting guiding mooring lines or ropes to prevent chafing and ensure proper lead angle - Complete guide for Indian seafarers covering IMU-CET and DG Shipping CoC examinations
Maritime TerminologyFathom - Complete Maritime Guide
Six feet or 1.83 meters depth measurement for soundings - Comprehensive guide for IMU-CET and DG Shipping CoC examinations
Maritime TerminologyFeeder Vessel
A smaller container ship transporting boxes between smaller regional ports and major hub ports where cargo is transferred to larger ocean vessels
Maritime TerminologyFender - Maritime Guide
Cushioning between ship and dock - Professional knowledge for maritime careers
Maritime TerminologyFetch
Distance wind travels over water
Maritime TerminologyFire Drill - Maritime Professional Guide
Fire emergency response practice testing firefighting procedures - Complete examination guide for IMU-CET and DG Shipping CoC
Maritime TerminologyFire Extinguisher
Portable fire fighting equipment
Maritime TerminologyFire Fighting - Maritime Professional Guide
Shipboard fire suppression operations using equipment and training - Complete examination guide for IMU-CET and DG Shipping CoC
Maritime TerminologyFixed Fire Fighting System
Permanent fire suppression
Maritime TerminologyFlag of Convenience (FOC) — What It Means in Shipping
Flag of Convenience definition for seafarers. What FOC means, which countries offer it, how it affects seafarer rights and working conditions.
Maritime TerminologyFlag Signals - Complete Maritime Communication Guide
Communication using international signal flags - Comprehensive guide for Indian seafarers covering IMU-CET and DG Shipping CoC examinations
Maritime TerminologyFlag State - Maritime Professional Guide
Country of ship registration with jurisdiction responsibility - Complete examination guide for IMU-CET and DG Shipping CoC
Maritime TerminologyFlag State Control
Regulatory oversight by a ship's country of registry ensuring compliance with international conventions — contrasted with Port State Control (PSC) inspections
Maritime TerminologyFlag State Inspection - Maritime Professional Guide
Ship registration country vessel survey and certification - Complete examination guide for IMU-CET and DG Shipping CoC
Maritime TerminologyFlooding - Maritime Professional Guide
Water ingress into vessel compartments threatening vessel stability - Complete examination guide for IMU-CET and DG Shipping CoC
Maritime TerminologyFog - Complete Maritime Guide
Low visibility atmospheric condition from suspended water droplets - Comprehensive guide for IMU-CET and DG Shipping CoC examinations
Maritime TerminologyFoghorn - Complete Maritime Communication Guide
Sound signal device for restricted visibility warning - Comprehensive guide for Indian seafarers covering IMU-CET and DG Shipping CoC examinations
Maritime TerminologyForecastle - Maritime Encyclopedia
Forward raised deck section providing weather protection and additional buoyancy reserve - Complete guide for Indian seafarers covering IMU-CET and DG Shipping CoC examinations
Maritime TerminologyForward - Complete Maritime Guide
Direction toward bow front end of vessel - Comprehensive guide for IMU-CET and DG Shipping CoC examinations
Maritime TerminologyForward of Beam
Between bow and abeam position
Maritime TerminologyFrame - Maritime Guide
Transverse structural rib supporting shell plating - Professional knowledge for maritime careers
Maritime TerminologyFree Surface Effect
The reduction in vessel stability caused by liquid movement in partially filled tanks — reduces metacentric height (GM) and can cause dangerous list or capsize
Maritime TerminologyFreeboard
The vertical distance from the waterline to the weather deck — minimum freeboard requirements are set by International Load Line Convention 1966
Maritime TerminologyFuel Oil Purifier
Fuel cleaning equipment
Maritime TerminologyFumigation - Maritime Professional Guide
Pest control using toxic gas treatment in cargo holds - Complete examination guide for IMU-CET and DG Shipping CoC
Maritime TerminologyFumigation Certificate
Documentation confirming a vessel or cargo has been treated with approved pesticides under supervised conditions — required for clearance at many ports
Maritime TerminologyFunnel - Complete Maritime Guide
Smokestack for engine exhaust gases vertical structure - IMU-CET and DG Shipping CoC examination guide for Indian seafarers
Maritime TerminologyGale
Strong wind force 34 to 47 knots
Maritime TerminologyGangway - Maritime Guide
Boarding ramp connecting ship to shore - Professional knowledge for maritime careers
Maritime TerminologyGantry Crane - Maritime Guide
Shore-based cargo handling crane - Professional knowledge for maritime careers
Maritime TerminologyGarbage Management Plan
A mandatory MARPOL Annex V document detailing how a vessel segregates, records, and disposes of garbage — required on all vessels 100 GT and above
Maritime TerminologyGarbage Record Book - Maritime Professional Guide
MARPOL Annex V required waste disposal documentation record - Complete examination guide for IMU-CET and DG Shipping CoC
Maritime TerminologyGeneral Average — What It Means in Maritime Law
General average definition in maritime law. What it means when a ship declares general average, who pays, and what seafarers need to know.
Maritime TerminologyGeneral Cargo Ship - Maritime Professional Guide
Multipurpose break-bulk carrier conventional cargo - Complete examination guide for IMU-CET and DG Shipping CoC
Maritime TerminologyGirder - Maritime Guide
Main structural beam providing strength - Professional knowledge for maritime careers
Maritime TerminologyGMDSS - Complete Maritime Guide
Global Maritime Distress Safety System satellite radio communication - IMU-CET and DG Shipping CoC examination guide for Indian seafarers
Maritime TerminologyGPS - Complete Maritime Guide
Global Positioning System satellite navigation for precise position determination - IMU-CET and DG Shipping CoC examination guide for Indian seafarers
Maritime TerminologyGross Tonnage
A dimensionless measure of a vessel's total internal volume calculated under Tonnage Convention 1969 — used for port dues, canal fees, and SOLAS applicability
Maritime TerminologyGross Tonnage - Ship Calculation Guide
Volume measurement of all enclosed spaces on ship - Technical guide for IMU-CET and DG Shipping CoC calculations
Maritime TerminologyGross vs Net Tonnage - Maritime Terms Explained
Total volume versus cargo volume measurement - Clear distinction for exam success
Maritime TerminologyGrounding - Maritime Professional Guide
Vessel running aground making contact with seabed unintentionally - Complete examination guide for IMU-CET and DG Shipping CoC
Maritime TerminologyGRT vs GT - Maritime Terms Explained
Old versus new tonnage measurement system - Clear distinction for exam success
Maritime TerminologyGunwale - Maritime Encyclopedia
Upper edge of ship's side where deck meets hull forming weather-tight seal - Complete guide for Indian seafarers covering IMU-CET and DG Shipping CoC examinations
Maritime TerminologyGyro Compass - Complete Maritime Guide
North-seeking compass using gyroscope principles unaffected by magnetic variation - IMU-CET and DG Shipping CoC examination guide for Indian seafarers
Maritime TerminologyHatch Cover
Cargo hold weathertight cover
Maritime TerminologyHatch Cover Test
An ultrasonic or hose test verifying weathertight integrity of cargo hatch covers — mandatory before departure on bulk carriers and general cargo ships
Maritime TerminologyHawse Pipe - Maritime Encyclopedia
Steel pipe through which anchor chain passes from deck to sea through ship's bow - Complete guide for Indian seafarers covering IMU-CET and DG Shipping CoC examinations
Maritime TerminologyHeat Exchanger
Heat transfer equipment
Maritime TerminologyHeave - Ship Motion Analysis
Vertical up down linear motion - Understanding ship dynamics for safe operations
Maritime TerminologyHeel - Ship Calculation Guide
Temporary inclination during turning maneuver - Technical guide for IMU-CET and DG Shipping CoC calculations
Maritime TerminologyHelicopter Operations - Maritime Professional Guide
Helicopter landing takeoff operations from vessel helideck - Complete examination guide for IMU-CET and DG Shipping CoC
Maritime TerminologyHog - Maritime Guide
Upward bending of keel amidships - Professional knowledge for maritime careers
Maritime TerminologyHold Cleaning - Maritime Professional Guide
Cargo space washing and preparation for next cargo loading - Complete examination guide for IMU-CET and DG Shipping CoC
Maritime TerminologyHopper Tank - Maritime Guide
Wing tank in bulk carriers below hatch - Professional knowledge for maritime careers
Maritime TerminologyHot Work - Maritime Professional Guide
Welding cutting or operations producing heat sparks or flames - Complete examination guide for IMU-CET and DG Shipping CoC
Maritime TerminologyHurricane - Complete Maritime Guide
Tropical cyclone in Atlantic Caribbean severe storm system - Comprehensive guide for IMU-CET and DG Shipping CoC examinations
EncyclopediaIMDG Code
The IMDG Code (International Maritime Dangerous Goods Code) regulates the safe transport of hazardous materials by sea. Learn classifications, packaging, stowage, and seafarer obligations.
Maritime TerminologyImmersion Suit
Cold water survival suit
Maritime TerminologyInboard
Toward ship centerline
Maritime TerminologyInert Gas System
A safety system on tankers that introduces inert gas into cargo tanks after discharge to maintain oxygen content below explosive threshold
Maritime TerminologyInternational Code Signals - Complete Maritime Communication Guide
Standardized flag and message code for ship communication - Comprehensive guide for Indian seafarers covering IMU-CET and DG Shipping CoC examinations
Maritime TerminologyISGOTT
International Safety Guide for Oil Tankers and Terminals — the standard reference for safe cargo operations, gas testing, and hot work procedures on tankers
Maritime TerminologyISM Code - Complete Maritime Guide
International Safety Management Code systematic ship operation safety - IMU-CET and DG Shipping CoC examination guide for Indian seafarers
Maritime TerminologyIsobar
Line of equal atmospheric pressure
Maritime TerminologyISPS Code - Complete Maritime Guide
Ship and Port Facility Security Code maritime security measures - IMU-CET and DG Shipping CoC examination guide for Indian seafarers
Maritime TerminologyJettison
The deliberate throwing of cargo or equipment overboard to save a vessel from sinking — creates a General Average claim against all cargo interests
Maritime TerminologyJetty - Maritime Guide
Structure projecting from shore into water - Professional knowledge for maritime careers
Maritime TerminologyJSA - Maritime Professional Guide
Job hazard analysis identifying risks before task execution - Complete examination guide for IMU-CET and DG Shipping CoC
Maritime TerminologyKeel - Maritime Encyclopedia
Main longitudinal structural member along bottom centerline providing backbone strength - Complete guide for Indian seafarers covering IMU-CET and DG Shipping CoC examinations
Maritime TerminologyKnot
A unit of speed equal to one nautical mile per hour — 1 knot = 1.852 km/h. The international standard for vessel and aircraft speed measurement
Maritime TerminologyKnot - Complete Maritime Guide
One nautical mile per hour maritime speed measurement unit - Comprehensive guide for IMU-CET and DG Shipping CoC examinations
Maritime TerminologyKnot vs Nautical Mile - Maritime Terms Explained
Speed unit versus distance unit - Clear distinction for exam success
Maritime TerminologyLashing
Cargo securing system
Maritime TerminologyLashing Certificate
Documentation certifying that deck cargo, containers, or vehicles have been secured according to the vessel's approved cargo securing manual
EncyclopediaLaycan (Laydays/Cancelling Date)
Laycan is the window of dates within which a ship must present its Notice of Readiness. Learn what laycan means, how it works, and charterer's cancellation rights.
Maritime TerminologyLaytime
The agreed time allowed by a charter party for loading and discharging a cargo — if exceeded, demurrage charges apply; if saved, dispatch money may be paid
Maritime TerminologyLead Line
A traditional depth-sounding device — a weighted line lowered to the seabed to measure water depth and sample bottom material — still required as backup to echo sounder
Maritime TerminologyLeague - Complete Maritime Guide
Three nautical miles or 5.56 kilometers historical distance - Comprehensive guide for IMU-CET and DG Shipping CoC examinations
Maritime TerminologyLife Jacket - Comprehensive Maritime Guide
Personal flotation device for abandonment survival at sea - Essential knowledge for IMU-CET and DG Shipping CoC examinations
Maritime TerminologyLife Raft - Comprehensive Maritime Guide
Inflatable emergency raft for ship abandonment survival - Essential knowledge for IMU-CET and DG Shipping CoC examinations
Maritime TerminologyLifeboat - Comprehensive Maritime Guide
Emergency evacuation boat for abandoning ship survival - Essential knowledge for IMU-CET and DG Shipping CoC examinations
Maritime TerminologyLifeboat Drill - Maritime Professional Guide
Emergency evacuation practice exercise testing crew response - Complete examination guide for IMU-CET and DG Shipping CoC
Maritime TerminologyLight Signals - Complete Maritime Communication Guide
Visual communication using signal lamps and lights - Comprehensive guide for Indian seafarers covering IMU-CET and DG Shipping CoC examinations
Maritime TerminologyLightering - Maritime Guide
Cargo transfer between ships at sea - Professional knowledge for maritime careers
Maritime TerminologyLightweight - Ship Calculation Guide
Empty ship weight without cargo fuel stores - Technical guide for IMU-CET and DG Shipping CoC calculations
Maritime TerminologyList - Ship Calculation Guide
Lateral inclination of ship to one side - Technical guide for IMU-CET and DG Shipping CoC calculations
Maritime TerminologyLNG Carrier - Maritime Professional Guide
Liquefied Natural Gas transport vessel specialized cargo - Complete examination guide for IMU-CET and DG Shipping CoC
Maritime TerminologyLOA vs LBP - Maritime Terms Explained
Length overall versus length between perpendiculars - Clear distinction for exam success
Maritime TerminologyLoad Line Certificate
An official certificate specifying the maximum depths to which a vessel may be loaded in various seasonal zones — regulated under Load Line Convention 1966
Maritime TerminologyLoad Line Convention - Maritime Professional Guide
Maximum loading limits convention ensuring reserve buoyancy - Complete examination guide for IMU-CET and DG Shipping CoC
Maritime TerminologyLongitudinal Bulkhead - Maritime Guide
Fore-aft dividing wall in hull - Professional knowledge for maritime careers
Maritime TerminologyLongshoreman - Maritime Guide
Dock worker handling cargo operations - Professional knowledge for maritime careers
Maritime TerminologyLookout Duty
A watchkeeping requirement under COLREGS Rule 5 to maintain proper sight and sound lookout at all times — dedicated lookout separate from officer of the watch
Maritime TerminologyMagnetic Compass
A navigational instrument using Earth's magnetic field to indicate direction — primary backup to gyrocompass on all vessels; requires regular deviation card checks
EncyclopediaMagnetic Variation and Deviation
Magnetic variation and deviation are the two errors that affect a ship's magnetic compass. Learn the difference, how to apply corrections, and how to calculate compass error.
Maritime TerminologyMain Engine
Primary propulsion machinery
Maritime TerminologyMan Overboard - Maritime Professional Guide
Person falling into water emergency requiring immediate response - Complete examination guide for IMU-CET and DG Shipping CoC
EncyclopediaMarine Surveyor
A marine surveyor is a qualified professional who inspects ships, cargo, and maritime equipment for safety, compliance, and insurance purposes. Learn types of surveys and when they occur.
Maritime TerminologyMARPOL - Complete Maritime Guide
Marine Pollution Prevention Convention preventing pollution from ships - IMU-CET and DG Shipping CoC examination guide for Indian seafarers
Maritime TerminologyMARPOL Annex I
International convention regulations governing prevention of oil pollution from ships — specifies oil record book requirements, prohibited discharge zones, and oily water separator standards
Maritime TerminologyMARPOL Annex VI
International regulations limiting air pollution from ships — sets limits on sulphur content in fuel (0.5% global cap since 2020) and nitrogen oxide emissions
Maritime TerminologyMast - Complete Maritime Guide
Vertical spar supporting navigation lights aerials communication equipment - IMU-CET and DG Shipping CoC examination guide for Indian seafarers
Maritime TerminologyMaster - Maritime Professional Guide
Ship's captain and commanding officer highest authority - Complete examination guide for IMU-CET and DG Shipping CoC
Maritime TerminologyMaster Mariner
The highest deck officer qualification allowing command of any vessel of any tonnage on any voyage — issued by DG Shipping after passing Class 1 (Master) examinations
Maritime TerminologyMayday
International distress signal call
Maritime TerminologyMCT - Ship Calculation Guide
Moment required to change trim centimetre - Technical guide for IMU-CET and DG Shipping CoC calculations
Maritime TerminologyMEO Class 1
Chief Engineer qualification for unlimited tonnage vessels — highest engineering officer certificate issued by DG Shipping after passing written and oral examinations
Maritime TerminologyMEO Class 4
Entry-level watchkeeping engineer qualification — first DG Shipping engineering certificate allowing the holder to stand an unsupervised engineering watch
Maritime TerminologyMetacentric Height - Ship Calculation Guide
Measure of initial stability righting moment - Technical guide for IMU-CET and DG Shipping CoC calculations
Maritime TerminologyMetacentric Height (GM)
A measure of a vessel's initial stability — the distance between the center of gravity (G) and the metacenter (M); positive GM indicates stable vessel, negative indicates unstable
Maritime TerminologyMeter - Complete Maritime Guide
SI base unit for length depth measurements 100 centimeters - Comprehensive guide for IMU-CET and DG Shipping CoC examinations
Maritime TerminologyMLC 2006 - Maritime Professional Guide
Maritime Labour Convention seafarer rights working conditions treaty - Complete examination guide for IMU-CET and DG Shipping CoC
Maritime TerminologyMonsoon - Complete Maritime Guide
Seasonal wind pattern affecting navigation and weather conditions - Comprehensive guide for IMU-CET and DG Shipping CoC examinations
Maritime TerminologyMooring - Comprehensive Maritime Guide
Securing ship to berth using lines for safe alongside position - Essential knowledge for IMU-CET and DG Shipping CoC examinations
Maritime TerminologyMooring Lines
Ropes or wires used to secure a vessel to a berth or another vessel — includes headline, breastline, springline, and sternline; specified in Mooring Equipment Guidelines
Maritime TerminologyMorse Code - Complete Maritime Communication Guide
Dots and dashes communication system for emergency signaling - Comprehensive guide for Indian seafarers covering IMU-CET and DG Shipping CoC examinations
Maritime TerminologyMuster List
A shipboard document specifying each crew member's emergency duties and station for drills and actual emergencies — must be posted at muster stations
Maritime TerminologyMuster Station
Emergency assembly point
EncyclopediaMuster Station and Emergency Muster
The muster station is the designated assembly point where crew and passengers gather during a ship emergency. Learn muster requirements, alarm signals, and emergency response procedures.
Maritime TerminologyNautical Mile
Distance unit equal to 1852 meters
Maritime TerminologyNautical Mile - Complete Maritime Guide
One minute of latitude approximately 1852 meters distance unit - Comprehensive guide for IMU-CET and DG Shipping CoC examinations
Maritime TerminologyNavigational Warning
A maritime broadcast warning of hazards to navigation — issued by NAVTEX, SafetyNET (INMARSAT), or VHF — includes wrecks, military exercises, ice, and other dangers
Maritime TerminologyNeap Tide
Low tidal range at quarter moon
Maritime TerminologyNear Miss - Maritime Professional Guide
Incident almost causing injury or damage requiring reporting - Complete examination guide for IMU-CET and DG Shipping CoC
Maritime TerminologyNet Tonnage - Ship Calculation Guide
Volume measurement of cargo-earning spaces only - Technical guide for IMU-CET and DG Shipping CoC calculations
Maritime TerminologyNot Under Command (NUC)
A vessel unable to maneuver as required due to exceptional circumstances — must display two black balls by day and two red lights vertically by night under COLREGS
Maritime TerminologyNotice of Readiness (NOR) — What It Means in Shipping
Notice of readiness definition in shipping. What NOR means in charterparties, when to tender it, laytime, and why it matters for cargo operations.
Maritime TerminologyOfficer of the Watch (OOW)
The officer responsible for the safe navigation and operation of a ship on behalf of the Master during their watch — must comply with COLREGS and bridge procedures
Maritime TerminologyOil Record Book
A mandatory logbook recording all operations involving oil or oily mixtures — Part I for machinery spaces, Part II for cargo/ballast operations; inspected during PSC
Maritime TerminologyOil Water Separator (OWS) — What It Means on Ships
Oil water separator definition for seafarers. How OWS works, MARPOL requirements, the 15 ppm rule, and consequences of bypassing the system.
Maritime TerminologyOiler - Maritime Professional Guide
Engine room rating machinery lubrication maintenance - Complete examination guide for IMU-CET and DG Shipping CoC
Maritime TerminologyOSV - Maritime Professional Guide
Offshore Support Vessel serving oil gas platforms - Complete examination guide for IMU-CET and DG Shipping CoC
Maritime TerminologyOut
Transmission ended no reply expected
Maritime TerminologyOutboard
Away from ship centerline
Maritime TerminologyOver
Transmission ended awaiting reply
Maritime TerminologyP&I Club — What It Means for Seafarers and Shipowners
P&I Club definition in maritime — Protection and Indemnity insurance explained for seafarers. What it covers, how it protects crews, and why it matters.
Maritime TerminologyPan-Pan
Urgency signal for serious situations
Maritime TerminologyPanting - Maritime Guide
In-out movement of bow plates in waves - Professional knowledge for maritime careers
Maritime TerminologyPassage Planning
The systematic process of charting a safe route before a voyage — includes appraisal, planning, execution, and monitoring; mandatory under STCW
Maritime TerminologyPeak Tank - Maritime Guide
Tank at bow or stern extremity - Professional knowledge for maritime careers
Maritime TerminologyPermit to Work
A formal safety management system document authorizing hazardous work — hot work, enclosed space entry, work aloft, electrical isolation — requiring risk assessment and sign-off
Maritime TerminologyPhonetic Alphabet - Complete Maritime Communication Guide
Standardized spelling alphabet for clear voice communication - Comprehensive guide for Indian seafarers covering IMU-CET and DG Shipping CoC examinations
Maritime TerminologyPilot Ladder
A rope ladder rigged on the ship's side for the safe embarkation and disembarkation of a marine pilot — construction and rigging regulated by SOLAS Chapter V
Maritime TerminologyPilotage - Comprehensive Maritime Guide
Harbor pilot navigation services in restricted waters - Essential knowledge for IMU-CET and DG Shipping CoC examinations
Maritime TerminologyPilotage Operations - Maritime Guide
Navigation by licensed harbor pilot - Professional knowledge for maritime careers
Maritime TerminologyPitch - Ship Motion Analysis
Up and down motion about transverse axis - Understanding ship dynamics for safe operations
Maritime TerminologyPlanned Maintenance - Maritime Professional Guide
Scheduled preventive maintenance system for ship equipment - Complete examination guide for IMU-CET and DG Shipping CoC
Maritime TerminologyPoop Deck - Maritime Encyclopedia
Raised deck at stern of ship above main deck level for navigation and accommodation - Complete guide for Indian seafarers covering IMU-CET and DG Shipping CoC examinations
Maritime TerminologyPort Side - Complete Maritime Guide
Left side of ship when facing forward toward bow - Comprehensive guide for IMU-CET and DG Shipping CoC examinations
Maritime TerminologyPort State Control - Maritime Guide
Port authority vessel inspection - Professional knowledge for maritime careers
Maritime TerminologyPort State Control (PSC)
Inspection of foreign-flag vessels in port to verify compliance with international conventions — Paris MOU, Tokyo MOU, Indian Ocean MOU; can detain non-compliant vessels
Maritime TerminologyPort State Control Inspection - Maritime Professional Guide
Foreign port authority vessel examination for SOLAS compliance - Complete examination guide for IMU-CET and DG Shipping CoC
Maritime TerminologyPort vs Harbour - Maritime Terms Explained
Facility with services versus natural shelter - Clear distinction for exam success
Maritime TerminologyPounding - Maritime Guide
Bow slamming down in heavy seas - Professional knowledge for maritime careers
Maritime TerminologyPrismatic Coefficient - Ship Calculation Guide
Longitudinal distribution of displacement volume - Technical guide for IMU-CET and DG Shipping CoC calculations
EncyclopediaPropeller (Ship)
A ship's propeller converts engine power into thrust to move the vessel through water. Learn types of propellers, fixed vs controllable pitch, cavitation, and how they work.
Maritime TerminologyPropeller Cavitation
Formation and collapse of vapor bubbles on propeller blades due to local pressure reduction — causes vibration, noise, and erosion damage to blades
Maritime TerminologyProwords
Procedural words for radio communication
Maritime TerminologyQuay - Maritime Guide
Stone or concrete wharf structure - Professional knowledge for maritime careers
Maritime TerminologyRadar - Complete Maritime Guide
Radio Detection and Ranging equipment for collision avoidance navigation - IMU-CET and DG Shipping CoC examination guide for Indian seafarers
Maritime TerminologyRadio Watchkeeping
The continuous monitoring of designated distress and safety frequencies — VHF Ch 16, MF 2182 kHz, and DSC watches required under GMDSS
Maritime TerminologyReduced Visibility
Any condition limiting sight below defined thresholds — fog, rain, snow, sandstorm — triggering COLREGS Rule 19 (safe speed, fog signals, radar use)
Maritime TerminologyReefer Container
Refrigerated shipping container
Maritime TerminologyRepatriation of Seafarers — What It Means and Your Rights
Repatriation definition for seafarers. When you have the right to repatriation, who pays, what MLC 2006 requires, and what to do if repatriation is denied.
Maritime TerminologyRescue Boat
A survival craft designed for man overboard recovery and rescue operations — separate from lifeboats; maintained ready for immediate deployment on all SOLAS vessels
Maritime TerminologyRighting Moment - Ship Motion Analysis
Moment returning ship to upright position - Understanding ship dynamics for safe operations
Maritime TerminologyRisk Assessment - Maritime Professional Guide
Hazard evaluation and mitigation planning before operations - Complete examination guide for IMU-CET and DG Shipping CoC
Maritime TerminologyRo-Ro - Maritime Professional Guide
Roll-on Roll-off vehicle carrier drive-on drive-off - Complete examination guide for IMU-CET and DG Shipping CoC
Maritime TerminologyRoger
Message received acknowledgment
Maritime TerminologyRoll - Ship Motion Analysis
Tilting side to side motion about longitudinal axis - Understanding ship dynamics for safe operations
Maritime TerminologyRoot Cause Analysis - Maritime Professional Guide
Incident investigation methodology finding fundamental causes - Complete examination guide for IMU-CET and DG Shipping CoC
Maritime TerminologyRPSL (Recruitment and Placement of Seafarers License)
A DG Shipping license required by manning agents and crewing companies in India to legally recruit and place seafarers on ships
EncyclopediaRudder (Ship)
A ship's rudder is the primary steering device that controls direction of movement. Learn how rudders work, types of rudders, steering failure, and emergency procedures.
Maritime TerminologySafe Manning Certificate
A flag state issued certificate specifying the minimum crew numbers and qualifications required for a vessel to operate safely — must be complied with at all times
Maritime TerminologySafe Manning Document — What It Means on Ships
Safe Manning Document definition for seafarers. What it is, who issues it, what it specifies, and consequences of sailing with fewer crew than required.
Maritime TerminologySafety Management System (SMS)
The documented procedures and instructions required under ISM Code for the safe operation of ships — includes emergency procedures, reporting mechanisms, and safety review processes
Maritime TerminologySailing vs Steaming - Maritime Terms Explained
Under sail power versus engine power - Clear distinction for exam success
Maritime TerminologySalvage - Maritime Professional Guide
Recovery of vessel or cargo from maritime distress or casualty - Complete examination guide for IMU-CET and DG Shipping CoC
Maritime TerminologySART - Comprehensive Maritime Guide
Search and Rescue Transponder radar response device - Essential knowledge for IMU-CET and DG Shipping CoC examinations
Maritime TerminologySay Again
Request to repeat message
Maritime TerminologySea Protest — What It Means in Maritime Law
Sea protest definition for seafarers and officers. When to file a sea protest, why it matters legally, and how the process works.
Maritime TerminologySea State
Wave height classification system
Maritime TerminologySea State
A description of ocean wave conditions using the Douglas Scale (0-9) — affects vessel motion, cargo security, helicopter operations, and crew safety assessments
Maritime TerminologySea Waves
Short choppy waves from local wind
Maritime TerminologySeamanship
The practical skill and knowledge of working on, navigating, and managing a ship safely — encompasses rope work, anchoring, mooring, cargo handling, and vessel maneuvering
Maritime TerminologySearchlight - Complete Maritime Communication Guide
High-intensity light for search and signaling operations - Comprehensive guide for Indian seafarers covering IMU-CET and DG Shipping CoC examinations
Maritime TerminologySeaworthiness — What It Means in Maritime Law and Practice
Seaworthiness definition for seafarers. What makes a ship seaworthy, legal obligations, and what happens when a ship is declared unseaworthy.
Maritime TerminologySecond Engineer - Maritime Professional Guide
Deputy chief engineer engine department second - Complete examination guide for IMU-CET and DG Shipping CoC
Maritime TerminologySecond Officer - Maritime Professional Guide
Navigation officer third-in-command watchkeeping duties - Complete examination guide for IMU-CET and DG Shipping CoC
Maritime TerminologySecurite
Safety message prefix announcement
Maritime TerminologySegregated Ballast Tanks
Dedicated ballast tanks completely separated from the cargo and fuel oil system — required on tankers over 20,000 DWT to prevent oil-water mixing
Maritime TerminologyShackle - Complete Maritime Guide
15 fathoms or 27.4 meters anchor chain length measurement - Comprehensive guide for IMU-CET and DG Shipping CoC examinations
Maritime TerminologyShell Plating - Maritime Guide
Outer hull plates forming watertight boundary - Professional knowledge for maritime careers
Maritime TerminologyShifting Boards
Grain cargo movement prevention boards
Maritime TerminologyShip Arrest — What It Means in Maritime Law
Ship arrest definition in maritime law. How a ship gets arrested, who can arrest it, and what happens to the crew when a ship is arrested in port.
Maritime TerminologyShip Chandler — What It Means in Shipping
Ship chandler definition for seafarers. What ship chandlers supply, how they operate, and what to watch out for when ordering ship stores in port.
Maritime TerminologyShip-to-Ship Transfer - Maritime Professional Guide
Cargo transfer between vessels at sea without port facilities - Complete examination guide for IMU-CET and DG Shipping CoC
Maritime TerminologyShips Articles
Employment contract for seafarers
Maritime TerminologyShore Leave — What It Means for Seafarers
Shore leave definition for seafarers. Your MLC 2006 right to go ashore, how port states restrict it, and what to do if denied.
Maritime TerminologySMS - Maritime Professional Guide
Safety Management System for ISM Code compliance shipboard - Complete examination guide for IMU-CET and DG Shipping CoC
Maritime TerminologySOLAS (Safety of Life at Sea)
The International Convention for the Safety of Life at Sea — the primary international treaty setting minimum safety standards for construction, equipment, and operation of merchant ships
Maritime TerminologySound Signals - Complete Maritime Communication Guide
Horn and whistle signals for navigation and maneuvering - Comprehensive guide for Indian seafarers covering IMU-CET and DG Shipping CoC examinations
Maritime TerminologySpare Parts Management - Maritime Professional Guide
Critical spares inventory control and procurement system - Complete examination guide for IMU-CET and DG Shipping CoC
Maritime TerminologySpeed vs Velocity - Maritime Terms Explained
Rate of motion versus rate with direction - Clear distinction for exam success
Maritime TerminologySpreader - Maritime Guide
Container lifting frame device - Professional knowledge for maritime careers
Maritime TerminologySpring Tide
High tidal range at new and full moon
Maritime TerminologySquall - Complete Maritime Guide
Sudden violent wind increase with rain temporary weather phenomenon - Comprehensive guide for IMU-CET and DG Shipping CoC examinations
Maritime TerminologyStability Booklet
The onboard reference document containing approved stability data and loading conditions for a specific vessel — must be used to verify stability before each voyage
Maritime TerminologyStarboard - Complete Maritime Guide
Right side of ship when facing forward toward bow - Comprehensive guide for IMU-CET and DG Shipping CoC examinations
Maritime TerminologySTCW - Complete Maritime Guide
Standards Training Certification Watchkeeping seafarer competency convention - IMU-CET and DG Shipping CoC examination guide for Indian seafarers
Maritime TerminologySTCW Certificate
Training compliance certificate
Maritime TerminologySTCW Convention
International Convention on Standards of Training, Certification and Watchkeeping for Seafarers (1978, amended 2010 Manila amendments) — the global framework for seafarer qualifications
Maritime TerminologySteering Gear
Rudder control mechanism
Maritime TerminologyStern - Complete Maritime Guide
Rear aft end of vessel structure - Comprehensive guide for IMU-CET and DG Shipping CoC examinations
Maritime TerminologyStevedore - Maritime Guide
Professional cargo loading unloading worker - Professional knowledge for maritime careers
Maritime TerminologyStowage Plan
Cargo location diagram
Maritime TerminologyStringer - Maritime Guide
Longitudinal structural strengthening member - Professional knowledge for maritime careers
Maritime TerminologySurge - Ship Motion Analysis
Forward backward linear motion - Understanding ship dynamics for safe operations
Maritime TerminologySway - Ship Motion Analysis
Side to side sliding linear motion - Understanding ship dynamics for safe operations
Maritime TerminologySwell - Complete Maritime Guide
Long-period waves from distant weather systems affecting vessel motion - Comprehensive guide for IMU-CET and DG Shipping CoC examinations
Maritime TerminologySwell Waves
Long rolling waves from distant weather
Maritime TerminologySWL - Maritime Guide
Maximum safe lifting capacity equipment - Professional knowledge for maritime careers
Maritime TerminologyTank Cleaning - Maritime Professional Guide
Cargo tank washing and gas freeing preparation operations - Complete examination guide for IMU-CET and DG Shipping CoC
Maritime TerminologyTanker - Maritime Professional Guide
Liquid cargo bulk carrier vessel petroleum chemicals - Complete examination guide for IMU-CET and DG Shipping CoC
Maritime TerminologyThird Engineer - Maritime Professional Guide
Junior engineering officer watchkeeping duties - Complete examination guide for IMU-CET and DG Shipping CoC
Maritime TerminologyThird Officer - Maritime Professional Guide
Junior deck officer watchkeeping safety duties - Complete examination guide for IMU-CET and DG Shipping CoC
Maritime TerminologyThrust Bearing
Propeller thrust support bearing
Maritime TerminologyTidal Range - Complete Maritime Guide
Difference between high and low tide water levels - Comprehensive guide for IMU-CET and DG Shipping CoC examinations
Maritime TerminologyTidal Stream
Current caused by tides
Maritime TerminologyTide
Rise and fall of sea level
Maritime TerminologyTomming
Vertical wooden support for cargo
Maritime TerminologyTon - Complete Maritime Guide
Weight measurement 1000 kilograms various marine applications - Comprehensive guide for IMU-CET and DG Shipping CoC examinations
Maritime TerminologyToolbox Talk - Maritime Professional Guide
Safety briefing discussion before commencing work activity - Complete examination guide for IMU-CET and DG Shipping CoC
Maritime TerminologyTowage - Maritime Guide
Tug boat assistance for maneuvering - Professional knowledge for maritime careers
Maritime TerminologyTowing Operation - Maritime Professional Guide
Vessel pulling another ship using towline for salvage or assistance - Complete examination guide for IMU-CET and DG Shipping CoC
Maritime TerminologyTPC - Ship Calculation Guide
Weight to change draft by one centimetre - Technical guide for IMU-CET and DG Shipping CoC calculations
Maritime TerminologyTPI
Weight to change draft by one inch
Maritime TerminologyTransom - Maritime Encyclopedia
Flat or curved surface forming stern of vessel affecting hydrodynamics - Complete guide for Indian seafarers covering IMU-CET and DG Shipping CoC examinations
Maritime TerminologyTransverse Bulkhead - Maritime Guide
Athwartship dividing wall - Professional knowledge for maritime careers
Maritime TerminologyTrim - Ship Calculation Guide
Difference between forward and aft draft - Technical guide for IMU-CET and DG Shipping CoC calculations
Maritime TerminologyTurbocharger
Engine air compression device
Maritime TerminologyTween Deck - Maritime Guide
Intermediate deck between cargo holds - Professional knowledge for maritime careers
Maritime TerminologyTyphoon - Complete Maritime Guide
Tropical cyclone in Western Pacific severe rotating storm system - Comprehensive guide for IMU-CET and DG Shipping CoC examinations
Maritime TerminologyUllage
Empty space above liquid cargo
EncyclopediaUnder-Keel Clearance (UKC)
Under-keel clearance (UKC) is the vertical distance between the ship's keel and the seabed. Learn minimum UKC requirements, calculations, and why it matters for safe navigation.
Maritime TerminologyUnit Load
Standardized cargo package
Maritime TerminologyVetting Inspection - Maritime Professional Guide
Oil company vessel quality assessment before charter approval - Complete examination guide for IMU-CET and DG Shipping CoC
EncyclopediaVetting Inspection (Tanker)
Vetting inspections assess tanker quality for oil major approval. Learn what SIRE/CDI inspections cover, how they work, and what seafarers need to know about OCIMF SIRE.
Maritime TerminologyVHF Radio - Complete Maritime Guide
Very High Frequency radio for ship-to-ship shore communication - IMU-CET and DG Shipping CoC examination guide for Indian seafarers
Maritime TerminologyWatch Keeping - Comprehensive Maritime Guide
Duty shift monitoring operations maintaining safe navigation - Essential knowledge for IMU-CET and DG Shipping CoC examinations
Maritime TerminologyWeathertight vs Watertight - Maritime Terms Explained
Doors preventing water ingress above versus below waterline - Clear distinction for exam success
Maritime TerminologyWeb Frame - Maritime Guide
Heavy transverse frame extra strength - Professional knowledge for maritime careers
Maritime TerminologyWharf - Maritime Guide
Structure parallel to shore for berthing - Professional knowledge for maritime careers
Maritime TerminologyWheelhouse - Complete Maritime Guide
Enclosed navigation control station protecting equipment and personnel - IMU-CET and DG Shipping CoC examination guide for Indian seafarers
Maritime TerminologyWilco
Will comply with instructions
Maritime TerminologyWindlass - Maritime Encyclopedia
Horizontal rotating drum machinery for anchor handling operations on forecastle deck - Complete guide for Indian seafarers covering IMU-CET and DG Shipping CoC examinations
Maritime TerminologyWindward
Direction wind blows from
Maritime TerminologyYaw - Ship Motion Analysis
Rotating motion about vertical axis - Understanding ship dynamics for safe operations
🧪 Free Financial Health Check
You know the terms. Do you know where your money stands?
Emergency Fund · Term Insurance · Health Cover · Debt · Investments — 5 questions. Instant score. Free.
Check My Financial Health — Free →