Garmin Apollo SL50 User Manual page 96

Comm Radio Operation
ENT
86
2. Turn the Large knob to select the frequency
type. Turn the Small knob to display the
available frequencies. The waypoint identifier,
type, and frequency are displayed.
119.80 s121.30 SLE atis 124.55
3. Press ENT to move the database frequency into
the Standby frequency position.
119.80 s124.55 SLE atis 124.55
or
Press the Flip/Flop key to move it into the Active
position.
124.55 s121.30 SLE atis 124.55
Frequency Abbreviations
TWR - Tower frequency (* indicates part time)
GRND - Ground frequency
ATIS - ATIS frequency
ATF - Air Traffic Frequency
APPR - Approach
ARR - Arrival
AWOS - Automatic Weather Station
CLR, CLD - Clearance/Delivery
CNTR - Area Control Center
CTAF - Common Traffic Advisory Frequency
DEP - Departure frequency
FSS - Flight Service Station/Remote FSS
GRND - Ground Control
RFSS - Remote Flight Service Station
TWR - Air Traffic Control Tower
UNIC - Unicom frequency
MF - Mandatory Frequency
UNKN - Unknown