Garmin GTN 650 Pilot's Guide - Page 275

14.6 DALT/TAS/Winds Foreword Density Alt / TAS / Winds - indicates the theoretical altitude at which your aircraft performs depending upon several variables, including indi- Getting Started cated altitude (Indicated ALT), barometric pressure (BARO) and total air temperature (TAT; the temperature, including the heating effect of speed, Xpdr Ctrl read on a standard outside temperature gauge). This item computes true airspeed (TAS) and density altitude, based upon the factors above. Also, Com/Nav this feature determines winds aloft - the wind direction and speed - and a head wind/tail wind component, based on true airspeed, aircraft heading FPL (HDG) and ground speed. Direct-To Touch To Select Touch To Select Indicated Altitude Calibrated Air Speed Touch To Select Ext Sensor Data Touch To Select Track Value Touch To Select Baro Pressure Touch To Select Total Air Temp Touch To Select Ground Speed Touch To Select Touch To Compute Data Heading Value And View Statistics Figure 14-37 Utility DALT/TAS/Winds Page (Edit Input Data) Proc Wpt Info Map Traffic Terrain Weather Nearest Music Utilities System Computed Statistics Touch To Return To Edit Input Data Page Figure 14-38 Utility DALT/TAS/Winds Page (Computed Data) Messages Symbols 1. If desired, touch the Use Sensor Data key. When Sensor data is selected, the Indicated Altitude, Calibrated Air Speed, Appendix Track, and Ground Speed values will be inserted by the external sensor and will not be selectable keys. Index 190-01004-03 Rev. B Garmin GTN 625/635/650 Pilot's Guide 14-23