Ship Types & Cargo (1–25)
- VLCC – Very Large Crude Carrier
- Suezmax – Max size for Suez Canal
- Panamax – Max size for Panama Canal
- Capesize – Too large for canals
- LNG – Liquefied Natural Gas
- LPG – Liquefied Petroleum Gas
- Ro-Ro – Roll-On/Roll-Off vessel
- LASH – Lighter Aboard Ship
- OBO – Ore-Bulk-Oil Carrier
- GC – General Cargo
- CNTR – Container
- TEU – Twenty-Foot Equivalent Unit
- BDC – Ballast Deck Cargo
- OIL – Oil Content Limitation
- FWD – Forward
- AHTS – Anchor Handling Tug Supply
- ATB – Articulated Tug Barge
- MSC – Mediterranean Shipping Company
- PIL – Port Instruction Letter
- CEV – Cargo Elevator Vessel
- LIF – Lifeboat (Cargo evacuation context)
- RO/RO – Roll-on/Roll-off ship type
- TCC – Tank Cleaning Certificate
- HAZ – Hazardous Cargo
- DWT – Deadweight Tonnage
- Navigation & Positioning (26–60)
- GPS – Global Positioning System
- AIS – Automatic Identification System
- ECDIS – Electronic Chart Display & Information System
- RADAR – Radio Detection And Ranging
- GMDSS – Global Maritime Distress & Safety System
- VHF – Very High Frequency
- MF/HF – Medium/High Frequency radio
- GNSS – Global Navigation Satellite System
- SOG – Speed Over Ground
- STW – Speed Through Water
- NP – Navigation Plan
- NP133C – Navigation Performance Check 133C
- UKC – Under Keel Clearance
- DP – Dynamic Positioning
- TWS – True Wind Speed
- TWA – True Wind Angle
- CAP – Capacity (load planning)
- LOA – Length Overall
- BEAM – Maximum ship width
- PPU – Planned Port Update
- ROT – Rudder Order Transducer
- VTS – Vessel Traffic Service
- ATON – Aid to Navigation
- NM – Nautical Mile
- WB – Water Ballast
- TSS – Traffic Separation Scheme
- MSL – Mean Sea Level
- Hs – Significant Wave Height
- ETA – Estimated Time of Arrival
- ETD – Estimated Time of Departure
- Safety & Emergency (61–95)
- SOLAS – Safety of Life at Sea
- ISM – International Safety Management
- ISPS – International Ship and Port Security
- DPA – Designated Person Ashore
- EEBD – Emergency Escape Breathing Device
- SCBA – Self-Contained Breathing Apparatus
- EPIRB – Emergency Position Indicating Radio Beacon
- AIS-SART – Search and Rescue Transponder
- LSA – Life-Saving Appliances
- FFA – Fire Fighting Appliances
- MOB – Man Overboard
- SOP – Standard Operating Procedure
- HSE – Health, Safety, Environment
- DOC – Document of Compliance
- COF – Certificate of Fitness
- COI – Certificate of Inspection
- SAR – Search and Rescue
- SSA – Ship Security Alert
- SSAS – Ship Security Alert System
- FOC – Flag of Convenience (safety/legal context)
- OOW – Officer of the Watch (bridge safety role)
- AW – Anchorage Watch
- FS – Fire Station
- PA – Public Address
- FA – Fire Alarm
- MOA – Memorandum of Agreement (safety/legal documentation)
- ERP – Emergency Response Plan
- SWL – Safe Working Load
- TML – Time Management Log
- PSU – Power Supply Unit
- Engine Room & Machinery (96–130)
- M/E – Main Engine
- AUX – Auxiliary Engine
- FO – Fuel Oil
- DO – Diesel Oil
- HFO – Heavy Fuel Oil
- LO – Lubricating Oil
- RPM – Revolutions Per Minute
- LUB – Lubrication System
- GT – Gross Tonnage
- NT – Net Tonnage
- MT – Metric Ton
- MTU – Marine Turbine Unit
- UMS – Unmanned Machinery Space
- PV – Pressure Vessel
- ECD – Engine Control Display
- MP – Maintenance Plan
- CTO – Chief Technical Officer
- CHENG – Chief Engineer
- RPM – Revolutions Per Minute
- BHP – Brake Horse Power
- CRANE – Cargo Crane (Engine-operated)
- DP – Dynamic Positioning (Engine control)
- TMS – Tank Management System
- D/D – Dry Dock
- NDT – Non-Destructive Testing
- ROT – Rudder Order Transducer
- ROV – Remotely Operated Vehicle (engine/inspection)
- HPA – High Pressure Air
- FOC – Fuel Oil Consumption
- TCC – Tank Cleaning Certificate
- SWL – Safe Working Load
- LIF – Lifeboat (engine room drills)
- AB – Able Seaman (engine watch duties)
- OS – Ordinary Seaman (engine tasks)
- HR – Hours of Rest
- Port & Operations (131–160)
- B/L – Bill of Lading
- LOC – Letter of Credit
- POB – Persons On Board
- TT – Tug/Tow Time
- COX – Coxswain
- CPL – Crew Planning List
- CO – Commanding Officer
- SOP – Standard Operating Procedure
- OPS – Operations
- CNTR – Container
- MSC – Mediterranean Shipping Company
- PIL – Port Instruction Letter
- DOC – Document of Compliance
- FOC – Flag of Convenience
- PSC – Port State Control
- P/I – Port/Instruction
- POB – Persons On Board
- C/O – Chief Officer
- 2/O – Second Officer
- 3/O – Third Officer
- AB – Able Seaman
- OS – Ordinary Seaman
- RCL – Remote Control Log
- S&P – Sale and Purchase
- MTOW – Maximum Take-Off Weight (helicopter onboard)
- NP – Navigation Plan
- ETA – Estimated Time of Arrival
- ETD – Estimated Time of Departure
- TT – Tug/Tow Time
- UKC – Under Keel Clearance
- Communication & Documentation (161–185)
- VHF – Very High Frequency
- MF/HF – Medium/High Frequency
- GMDSS – Global Maritime Distress & Safety System
- SMS – Safety Management System
- DOC – Document of Compliance
- COC – Certificate of Competency
- POA – Power of Attorney
- P/I – Port/Instruction
- SOP – Standard Operating Procedure
- ERP – Emergency Response Plan
- PA – Public Address
- FA – Fire Alarm
- MET – Meteorological Report
- WX – Weather
- XBT – Expendable Bathythermograph
- INMARSAT – International Maritime Satellite Organization
- ISO – International Organization for Standardization
- COI – Certificate of Inspection
- MOA – Memorandum of Agreement
- PIL – Port Instruction Letter
- CEV – Cargo Elevator Vessel
- OPS – Operations
- ROV – Remotely Operated Vehicle
- SSA – Ship Security Alert
- SSAS – Ship Security Alert System
- Classification & Regulatory Bodies (186–200)
- LR – Lloyd’s Register
- ABS – American Bureau of Shipping
- DNV – Det Norske Veritas
- BV – Bureau Veritas
- RINA – Registro Italiano Navale
- IRS – Indian Register of Shipping
- CCS – China Classification Society
- IACS – International Association of Classification Societies
- MARPOL – Marine Pollution Convention
- SOLAS – Safety of Life at Sea
- ISM – International Safety Management
- ISPS – International Ship & Port Security
- IMSBC – International Maritime Solid Bulk Cargoes Code
- IMOCA – International Monohull Class Association
- ILO – International Labour Organization
- NOx – Nitrogen Oxides
- EEDI – Energy Efficiency Design Index
- EEXI – Energy Efficiency Existing Ship Index
- CSR – Common Structural Rules
- PSC – Port State Control
- HSE – Health, Safety, Environment
- FOC – Flag of Convenience
- COF – Certificate of Fitness
- DOC – Document of Compliance
- COI – Certificate of Inspection
