Garmin GTN 750 Pilot's Guide - Page 135

• If the CDI output has not automatically switched from GPS to ILS upon reaching the FAF, you must manually switch to the VLOC receiver by Foreword touching the CDI key. Verify that "VLOC" is displayed. Getting Started • Automatic switching of CDI output is available for ILS, localizer, SDF and LDA approaches. Automatic CDI switching is not available for backcourse Audio & Xpdr Ctrl approaches or VOR approaches. Com/Nav • When flying an approach with the autopilot-coupled, you must monitor system functions at all times and verify that the autopilot and external CDI FPL (or HSI) switch to the VLOC receiver with sufficient time to capture and track the approach course. Switching to "VLOC" late in the approach may Direct-To not provide the autopilot enough time to respond and intercept the approach course prior to the FAF (depending upon the performance characteristics of Proc your autopilot and aircraft). In such instances, you should manually fly the approach or refer to the documentation provided with your autopilot. Charts • When an ILS or VOR approach is first selected or executed, the frequency Wpt Info is automatically checked. If the frequency is incorrect, you will receive a message and you must place the correct ILS or VLOC frequency in the Map active frequency field. • When flying a localizer-based approach (other than backcourse) with Traffic automatic CDI switching enabled: 1. "GPS" guidance may be used while flying outbound and on Terrain the initial portion of the procedure turn. Weather 2. "VLOC" guidance is used on the remainder of the approach from the time you turn inbound on the procedure turn. Nearest 3. The localizer frequency must be active to use "VLOC" guidance at the MAP. Music • When flying a localizer-based approach with automatic CDI switching Utilities disabled. 1. You may select "VLOC" guidance at any point on the approach System prior to reaching the FAF. Messages 2. The localizer frequency must be active to use "VLOC" guidance. Symbols Appendix 190-01007-03 Rev. B Garmin GTN 725/750 Pilot's Guide 6-19 Index