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Abbreviations and Acronyms



Second Officer


Second Half
3/O Third Officer


Third Party Logistics
6-on/6-off Watchkeeping routine shared by two officers: 24 hour period is covered by each working 6 hours on watch, followed by 6 hours off watch
A/C Account
A/H Anchor Handling
A/O And/Or
A/S Alongside
AA Always Afloat
AAAA Always Afloat, Always Accessible
AAOSA Always Afloat Or Safe Aground
AAPA American Association of Port Authorities
AAR Against All Risks
AARA 1. Always Accessible or Reachable on Arrival
2. Amsterdam-Antwerpen-Rotterdam Area
AB Able Bodied seaman
ABP Associated British Ports


American Bureau of Shipping (classification society)
ABT About
AC Alternating Current (electricity)
ACE Alternative Control of Emissions


Advance Commercial Information


1. Alternative Compliance Plan
2. Area Contingency Plan (US)
ACT Account
ACV 1. Actual Cash Value
2. Air Cushion Vehicle
AD 1. After Date
2. Area Differential


Americans with Disability Act (US)
ADAAG Americans with Disabilities Act Accessibility Guidelines (US)
ADCOM Adress Commission
ADF Automatic Direction Finder
ADOMS Antigua and Barbuda Department of Marine Services and Merchant Shipping


1. Alternative Dispute Resolution
2. European Agreement on the International Carriage of
Dangerous Goods by Road

AEO Authorized Economic Operator
AF Anti-Fouling
AFE Approved for Expenditure
AFFF Aqueous Film Forming Foam
AFFREIGHTMENT The hiring of a ship in whole or part
AFRA Average Freight Rate Assessment

AFS Convention

Anti-Fouling Systems Convention
International Convention for the Control of Harmful Anti-Fouling Substances on Ships, 2001
AFSPS Arrival First Sea Pilot Station (Norway)
AFT At or towards the stern or rear of a ship
AG Arabian Gulf
AGW 1. Actual Gross Weight
2. All Going Well
AH 1. Aft Hatch
2. Antwerp / Hamburg range
AHL Australian Hold Ladders
AHT Anchor Handling Tug

Anchor Handling Tug Supply


Anchor Handling Tug


Acquired Immune Deficiency Syndrome


Automatic (Vessel) Identification System


Administration of Justice Act, 1956
Al Aluminium
ALARP As Low As Reasonably Practical
ALERT Automatic Life-saving Emergency Radio Transmitter
ALJ Administrative Law Judge
ALOP Advanced Loss of Profits
ALP Articulated Loading Platform
ALRS Admiralty List of Radio Signals
ALU Aluminium


Automated Manifest System


Australian Maritime Safety Agency
AMSL Above Mean Sea Level


Automated Mutual-assistance Vessel Rescue system


Americanised Welsh Coal Charter party (standard coal charterparty)
ANERA Asia-North America Eastbound Rate Agreement
ANOP Articles Not Otherwise Provided for


Aquatic nuisance species
ANSI American National Standard Institute
ANT Advance Notice of Transfer
ANTHAM Antwerp-Hamburg range
AO 1. Awaiting Orders
2. And Other
AOAOO Any One Accident Or Occurrence
AOB Any One Bottom


Active Operator Guidance
AOH/A.O.H. After Office Hours
AOLOC Any One Location
AOR Atlantic Ocean Region
AOS Any One Steamer
AOV Any One Vessel
AP 1. All Purposes
2. Additional Premium
3. Aft Perpendicular
4. Autopilot
APC Alternative Planning Criteria
APHIS Animal and Plant Health Inspection Service (US)
API American Petroleum Institute


Act to Prevent Pollution from Ships (US)


Additional insurance premiums
APS Arrival Pilot Station
APT Aft Peak Tank


Australian Quarantine Inspection Service
ARA Antwerp - Rotterdam - Amsterdam range
ARAG Amsterdam-Rotterdam-Antwerp-Gent range
ARB Arbitration
ARCC Aeronautical Rescue Co-ordination Centre
ARND Around
ARPA Automatic Radar Plotting Aid
ASAP As Soon As Possible
ASBA The Association of Shipbrokers and Agents (USA) Incorporated, New York


Accelerated Small Claims Arbitration Procedure
ASCII American Standard Code for Information Interchange
ASI Anti-Suit Injunction


Application Service Provider
ASPW Any Safe Port in the World
ASTM American Society of Testing & Materials
ATA Actual Time of Arrival
ATC Actual Time Counting
ATD Actual Time of Departure
ATDN Any Time Day & Night
ATDNSHINC Any Time Day or Night Sundays and Holidays Included
ATF Approved Transitional Facility
ATK Aviation Turbine Kerosene


Actual Total Loss
ATS 1. All Time Saved
2. Automated Targeting System


Aviation and Transportation Security Act
ATSBE All Time Saved Both Ends
ATSDO All Time Saved Discharging Only
ATUTC 1. Actually Time Used To Count
2. All Time Used to Count


Australian Marine Environment Protection Association
AUSSIE Australia


Australian Wheat Charter
AUV Autonomous Underwater Vehicle
AUX Auxilliaries
AVGAS Aviation Gasoline
AVR Automatic Voltage Regulator
AVRA Automated Voyage Risk Assessment

Aviation Turbine Gasoline

AWIWL Always Within Institute Warranty Limits
AWVNS Always Within Vessel's Natural Segregation
AWRI Additional War Risk Insurance

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