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21
Getting Started
Powering Off Unit
Congratulations! You’ve now gone through the basic operation of the Garmin GPSMAP 178/178C
Sounder. Your new digital chartplotter is a powerful tool with many advanced features not covered in the
Getting Started tour. For detailed instructions on using these features or performing a specific task, please
refer to the Quick Reference Guide or the appropriate reference section of this manual. The unit is still in
Simulator mode for practice, but automatically returns to it’s ‘Normal’ operation mode when you shut it
off and turn it back on.
To turn the GPSMAP 178/178C Sounder off:
1. Press and hold the POWER key for about 2 seconds, until the screen is blank.
2. When the screen is blank, release the POWER key.
The next section of the manual describes the pages and functions of the GPSMAP 178/178C Sounder
in detail. If you are unable to locate a specific option or function, please refer to the Index.