B-61  Appendix B Menu List and Materials 
 
 
 
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APP B
 
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APP C
 
 
 
B.4  Lists of Terminologies, Units, and 
Abbreviations 
 
Abbreviation Term 
A 
A/D = AD  Analog/ Digital 
A/P = AP  Auto Pilot 
AC Alternating Current 
ACC  Actual Course Change 
ACCA  Actual Course Change Alarm 
ACK Acknowledge 
ACQ Acquire, Acquisition 
ACT Activate 
AIO  Admiralty Information Overlay (additional information to the navigation)   
AIS Automatic Identification System 
ALC  Alert LAN Converter 
AMP Amplifiers 
AMS  Alert Management System 
ANT Antenna 
ARCS  Admiralty Raster Chart Service (A raster chart published by UKHO.) 
ASCII  American Standard Code for Information Interchange 
ASIC Application Specific Integrated Circuit 
AtoN  Aids to Navigation 
AUTO = auto  Automatic 
Av. = AVE  Average 
AVCS  Admiralty Vector Chart Service 
AZ Acquisition Zone 
AZI Azimuth Stabilisation Mode 
B 
BAM  Bridge Alert Management 
BCR  Bow Crossing Range 
BCT  Bow Crossing Time 
BFT Beaufort 
BNWAS  Bridge Navigational Watch Alarm System 
BP Bearing Pulse 
BRG Bearing 
BWW  Bearing to waypoint to waypoint 
BZ Bearing Zero