12.4 Vertical Navigation (Aviation Feature) 12-412.5 Closest Point of Approach 12-513 MESSAGES 13-114 INSTALLATION AND MAINTENANCE 14-114.1 Specifications 14-114.2 Electrical Wiring 14-314.3 Gimbal Bracket Installation 14-414.4 Slide Mount Operation 14-614.5 Battery Pack Operation 14-914.6 Maintenance 14-1014.7 Customer Support 14-1015 SAMPLE SIMULATED TRIP 15-1APPENDICESA GPS — HOW DOES IT WORK A-1A.1 GPS Overview A-1A.2 Coverage and Accuracy A-1A.3 GPS Receiver Designs A-2B ACRONYMS AND ABBREVIATIONS B-1C LOCAL TIME TO UTC TIME CONVERSION C-1vD INDEX D-1