Garmin Apollo SL50 User Manual page 41

3. Turn the Large knob to move between the time
value fields.
Countdown Timer
4. Turn the Small knob to edit the hours, minutes,
or seconds value.
Countdown Timer
5. Press ENT to start the timer at the selected time
ENT
value.
MSG
6. After the Countdown Timer value expires, press
the MSG key to note the time out message.
Navigation Basics
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