Garmin GNC 420W Pilot's Manual Addendum

Also see for GDL 69: Pilot's guide addendum Pilot's guide addendum Activation Instructions Pilot's guide Activation Instructions

Contents

Garmin GNC 420W Pilot's Manual Addendum Manual pdf 35 page image

31Part Three: Section 2TAWS OperationTo change the display range:1. Select the TAWS Page and press up or downon the RNG key to select the desired range:1 NM, 2 NM, 5 NM, 10 NM, 25 NM, 50 NM,100 NM.Aviation information such as airports, VORs, andother navaids can be turned on or off on the TAWSPage.To show or hide aviation information:1. Press MENU.2. Select “Show (or Hide) Aviation Data?” andpress ENT. Pressing the CLR key when theTAWS Page is displayed can also be used totoggle aviation information on or off.Aviation DataInhibit ModeTAWS provides an “inhibit mode”. This mode isdesigned to deactivate PDA/FLTA aural and visualalerts when they are deemed unnecessary by theaircrew. Flying VFR into an area where unique terrainexists could cause the system to annunciate a nuisancealert. Pilots should use discretion when inhibitingthe TAWS system and always remember to enable thesystem when appropriate. Only the PDA and FLTAalerts are disabled in the inhibit mode. See section 3for more information on TAWS alerts.Inhibiting TerrainTo inhibit PDA and FLTA alerts:1. Select the TAWS Page and press MENU.“Inhibit Terrain?” is selected by default.2. Press ENT. The PDA/FLTA alerts are inhibited.The annunciation is displayed inthe terrain annunciator field whenever terrainis inhibited.To enable PDA and FLTA alerts:1. Select the TAWS Page and press MENU.“Enable Terrain?” is selected by default.2. Press ENT. The PDA/FLTA alerts are functionalagain.External TAWS Inhibit ControlAn optional installation is allowed for providingan external TAWS Inhibit switch. Pressing the externalTAWS Inhibit switch toggles the TAWS inhibit on andoff in the same manner as using the Page Menu selec-tion.