14-24
GTN 625/635/650 Pilot’s Guide
190-01004-03 Rev. P
Utilities
14.6 DALT/TAS/Winds
Density Alt / TAS / Winds
— indicates the theoretical altitude at which
your aircraft performs depending upon several variables, including indicated
altitude (Indicated ALT), barometric pressure (BARO) and total air temperature
(TAT; the temperature, including the heating effect of speed, read on a standard
outside temperature gauge). This item computes true airspeed (TAS) and
density altitude, based upon the factors above. Also, this feature determines
winds aloft — the wind direction and speed — and a head wind/tail wind
component, based on true airspeed, aircraft heading (HDG) and ground
speed. When a FADC provides pressure altitude and the Use Sensor Data
option is selected, the Baro key will not be present in the edit mode and the
Baro indication will not be shown in computed results.
NOTE:
The capability of using Sensor Data is available in software versions
2.00, 4.10, and later.
Touch to Toggle
Sensor Data Use
Touch to
Compute Data
and View
Statistics
DALT, TAS, and
Winds Statistics
Figure 14-37 Utility DALT/TAS/Winds Page Using Sensor Data and Pressure Altitude
Touch to Toggle
Sensor Data Use
Touch to
Compute Data
and View
Statistics
DALT, TAS, and
Winds Statistics
Figure 14-38 Utility DALT/TAS/Winds Page Using Sensor Data and Indicated Altitude
Touch to Select
Ground Speed
Touch to Select
Indicated Altitude
Touch to Select
Baro Pressure
Touch to Select
Calibrated Air Speed
Touch to Select
Total Air Temp
Touch to Select
Track Value
Touch to Select
Heading Value
Touch to Compute
Data and View
Statistics
Figure 14-39 Utility DALT/TAS/Winds Page Using Manually Entered Data
Summary of Contents for GTN 625
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