InstallationAPPENDIX A56Mounting the GPS 120XLThe GARMIN GPS 120XL’s compact case is suitablefor mounting in exposed locations or at the nav station.The unit comes with a gimbal bracket that can be usedfor surface, overhead, or flush mounting. When choos-ing a location for the display unit, make sure you con-sider the following conditions:• There should be at least 2.00” (5.0 cm) clearancebehind the case to allow connection of the anten-na and power/data cables.• The mounting surface should be rigid enough tosupport the unit and protect it from excessivevibration and shock.To surface mount the GPS 120XL:1. Place the mounting bracket in the desired location.2. Mark and drill the four mounting holes for the fasten-ers you are using.3. Fasten the bracket to the surface using the appropri-ate fasteners.4. Insert the GPS 120XL into the mounting bracket.5. Screw the two mounting knobs through the bracketand into the GPS 120XL.6. Connect the power/data and antenna cables to theback of the unit, making sure the locking rings arefully tightened on both connectors.