Garmin GPS 75 - Manual (Page 65)

C-5
C.3 UNIVERSAL MOUNT INSTALLATION
The GPS 75 is equipped with a universal mount for fixed installations.
The universal mount may be installed above the dash or attached to a
surface as shown below.
Although your GPS 75 is designed to withstand the marine environment,
it is recommended that it be mounted in a location which provides
protection from sun and spray. Before permanent mounting, you may
wish to apply power to the unit and look at the display in the desired
mounting location to ensure you have the desired viewing angle.