Garmin G300 Pilot's Manual page 273

OAT Outside Air Temperature
OBS Omni Bearing Selector
psi pounds per square inch
QTY quantity
rpm revolutions per minute
SBAS Satellite-Based Augmentation System
SD Secure Digital
sec second(s)
SIGMET Significant Meteorological Information
TACAN Tactical Air Navigation System
TAF Terminal Aerodrome Forecast
TAS True Airspeed
TER terrain
TFR Temporary Flight Restriction
TOPO topographic
Track Direction of aircraft movement relative to a ground
position; also 'Ground Track'
TRSA Terminal Radar Service Area
UTC Coordinated Universal Time
VFR Visual Flight Rules
VHF Very High Frequency
VNAV vertical navigation
VOL volume
190-00921-00 Rev. D Garmin G300 Pilot's Guide
appendix g
255