Maritime Signal Flags & Abbreviations - A




Diver below (when stationary); I am undergoing a speed trial

A. & C.P. Anchors and Chains Proved
A.C. Account Current
a.h. after hatch
a.m. ante meridiem
A.V. Ad Valorem
A/C Account, Altered Course
A/d After date
A/or And or
A/P Additional Premium
A/S After sight, Alongside
A1 Top category or in "Good Condition"
AA Always Afloat
Aa Arrival After
AAAA Always Afloat, Always Accessible
AAIC Accounting Authority Identification Code
AAOSA Always Afloat Or Safe Aground
AAR Against All Risks (insurance clause)
AARA Always Accessible or Reachable on Arrival
ABI U.S. Customs' "Automated Broker Interface," by which brokers file importers' entries electronically
ABS American Bureau of Shipping (classification society)
abt. about
AC Air Conditioner/ Activated Carbon/ Alternating Current
Acc Accepted, Acceptance
ACS (A.C.S.) U.S. Customs' master computer system, "Automated Commercial Systems."
AD Area Differential
Add. Addressed
AF Advanced Freight/ Anti-Fouling
AFFF Aqueous Film Forming Foam
Aframax/ AFRA tanker < 80,000 dwt (average freight rate assessment)
AGW Actual Gross Weight/ All Going Well
AHTS Anchor Handling Tug and Supply Vessel
AIS Automatic Identification System
ALERT Automatic Life-saving Emergency Radio Transmitter
ALRS Admiralty List of Radio Signals
Alk. Alkilinity
AM Anti Meridian
AMNI Associate Member of The Nautical Institute
Amps. Amperes
AMS The U.S. Customs' "Automated Manifest System"
AMSL Above Mean Sea Level
AMVER US Coast Guard's Automated Mutual-Assistance Vessel Rescue System
ANSI American National Standard Institute
AO Awaiting Orders/ And Other
AOB Any One Bottom
AOH After Office Hours
AOLOC Any One Location
AOR Atlantic Ocean Region
AOS Any One Steamer
AOV Any One Steamer
AP All Purposes/ Additional Premium/ Aft Perpendicular
API American Petroleum Industry
APS Arrival Pilot Station
APT Aft Peak Tank
AR All Risks
ARCS Admiralty Raster Chart Service
ARPA Automatic Radar Plotting Aids
ARQ Automatic Repetition Request
ASAP As Soon As Possible
ASBA The Association of Shipbrokers and Agents (USA) Incorporated, New York
ASCII American Standard Code for Information Interchange (IT)
ASPW Any Safe Port in the World
ASTM American Society of Testing & Materials
AT American Terms (grain)
ATA Actual Time of Arrival
ATD Actual Time of Departure
ATDN Any Time Day & Night
ATDNSHINC Any time Day or Night Sundays & Holidays Included.
ATK Aviation Turbine Kerosene
atm Atmosphere
ATS All Time Saved
ATSBE All Time Saved Both Ends
ATSDO All Time Saved Discharging Only
ATUTC Actual Times Used To Count
AUSREP Australian ship Reporting System
AUV Autonomous Underwater Vehicle
Av. Average
AVGAS Aviation Gasoline
AVR Automatic Voltage Regulator
AVTAG Aviation Turbine Gasoline
AWIWL Always within Institute Warranties Limits (Insurance purpose).
AWVNS Always Within Vessel's Natural Segregation
AWRI Additional War Risk Insurance