10-24Garmin GTN 625/635/650 Pilot’s Guide 190-01004-03 Rev. FForewordGettingStartedXpdr CtrlCom/NavFPLDirect-ToProcWpt InfoMapTrafflcTerrainWeatherNearestServices/MusicUtilitiesSystemMessagesSymbolsAppendixIndex10.4.4.3 External HTAWS Inhibit ControlAn optional installation is allowed for providing an external HTAWS Inhibitswitch. Pressing the external HTAWS Inhibit switch toggles the HTAWS inhibiton and off in the same manner as using the Terrain Menu selection.10.4.4.4 Reduced Protection ModeThe Reduce Protection (RP) functionality allows operating with a reductionin the alerting thresholds, and suppresses visual and aural annunciation ofcaution alerts. Reduced protection allows low level operations and landings offairport with a minimum number of alerts while continuing to provide protectionfrom terrain and obstacles. Reduced Protection should only be selected whenoperating in visual contact with the terrain as alerting times are significantly lessthan in normal mode. There is support for an external RP Mode switch and anexternal Alert Acknowledge switch.To toggle protection:1. While viewing the Terrain/HTAWS Page, touch MENU.2. Touch the RP Mode key to toggle the RP mode on and off.The green bar will show when RP mode is active.3. Touch Back to return to the Terrain/HTAWS display. The “RPMode” annunciation is displayed in the terrain annunciatorfield and in the lower right corner of the terrain page wheneverprotection is reduced.
