Transystem 747 A+ - Manual (Page 7)

7
1.6 Power Switch and Push Button
Power Switch
Right (Off)
Power off
Middle (NAV) Enable Navigation mode
Left (LOG)
Enable Navigation + log mode
Push button
Push
Push to log points of interest, LED blinks 3 times.
Difference between NAV and LOG:
NAV
Working as a Bluetooth GPS receiver.
LOG Both of navigation and logging functions are enabled.