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AP-16
APPENDIX 3 LIST OF ABBREVIA-
TIONS
Control unit
Abbreviations
Abbreviation Term Abbreviation Term
ACK Acknowledge LV Level
AGC Automatic Gain Control MAR March
ANT Antenna MMSI Maritime Mobile Services
Identity number
APP Application MSG Message
APR April NB Noise Blanker
ATT Attenuator NBDP Narrow Band Direct Printing
AUG August NF Notch Filter
BRILL Brilliance NOV November
COMM Communication NR Noise Reduction
DEC December OCT October
DSC Digital Selective Calling PSTN Public Switched Telephone
Networks
DUP Duplex PWR Power
ENT Enter REF Reference
EPFS Electronic Position Fixing
System
RF Radio Frequency
EQUIP Equipment RX Receive
FEB February S-DUP Semi-Duplex
FREQ Frequency SEP September
GMDSS Global Maritime Distress and
Safety System
SIMP Simplex
INFO Information SP Speaker
INTERCOM Intercommunication System SQ Squelch
INTL International TLX Telex
JAN January TRX Transmit and Receive
JUL July TX Transmit
JUN June UTC Coordinated Universal Time/
Universal Time, Coordinated
LAT Latitude WR Watch Receiver
LON Longitude