APPENDIX 5 ABBREVIATIONS, UNITS AND SYMBOLS
AP-16
R:
S:
T:
U:
V:
W:
Abbreviation Meaning Abbreviation Meaning
RA Rain ROM Read Only Memory
RAIM Receiver Autonomous
Integrity Monitoring
ROM(M) ROM (Monitor Unit)
ROM(T) ROM (Transponder Unit)
RAIN Rain ROT Rate Of Turn
RAM Random Access Memory RSSI Received Signal Strength
Indication
RAM(M) RAM (Monitor Unit)
RAM(T) RAM (Transponder Unit) RTA Requested Time of Arrival
RFM Regional Function Message RX Receive
RNG Range
Abbreviation Meaning Abbreviation Meaning
S South SFI System Function ID
SAR Search And Rescue SIM Simulation
SART Search And Rescue
Transponder
SN Snow and Ice
SART ACT. SART active SOG Speed Over the Ground
SE Southeast SOLAS Safety Of Life At Sea
SEP September STW Speed Through the Water
SET Set (i.e., set and drift, or setting
a value)
SW Southwest, Switch
SYNC Synchronization
Abbreviation Meaning Abbreviation Meaning
TCPA Time to Closest Point of
Approach
TOW Vessel engaged in towing oper-
ations
TEST Test TRANS Transition
TH Thunderstorm TRX Transceiver
TI Turn rate Indicator TX Transmit
TIME Time
Abbreviation Meaning Abbreviation Meaning
UN/
LOADED
LOADED or UNLOADED UTC Universal Coordinated Time
Abbreviation Meaning Abbreviation Meaning
VHF Very High Frequency VSWR Voltage Standing Wave Ratio
Abbreviation Meaning Abbreviation Meaning
W West, Wide WI Wind
WARNING Warning WIG Wing In Ground
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