Multiple Baro-Corrected Altitude Sources; Multiple Heading Sources - Garmin GTN 725 Installation Manual
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Also See for GTN 725:
- Pilot's manual (554 pages) ,
- Cockpit reference manual (112 pages) ,
- Reference manual (110 pages)
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2.3.2
Multiple Baro-Corrected Altitude Sources
The GTN unit can accept baro-corrected altitude from multiple ARINC 429 and RS-232 sources.
If multiple sources of baro-corrected altitude data are supplied to the GTN, only valid data from the
highest priority source is used. If the highest priority source becomes unavailable, data is taken from the
next-highest priority source. The priorities of the baro-corrected altitude sources are as follows from
highest to lowest:
1. ARINC 429 label 204 from Airdata
2. ARINC 429 label 204 from Garmin GDU
3. ARINC 429 label 204 from EFIS/Airdata
4. ARINC 429 label 204 from Data Concentrator
5. RS-232 bus from Shadin Fuel and Air Data Computer
2.3.3
Multiple Heading Sources
The GTN unit can accept heading data from multiple ARINC 429, RS-232, and Synchro sources. If
multiple sources of heading data are supplied to the GTN, only valid data from the highest priority source
is used. If the highest priority source becomes unavailable, data is taken from the next-highest priority
source. The priorities of the heading sources are as follows from highest to lowest:
1. ARINC 429 label 314 from EFIS or Honeywell EFIS
2. ARINC 429 label 320 from EFIS or Honeywell EFIS, corrected for local magnetic variation
3. ARINC 429 label 320 from EFIS/Airdata, corrected for local magnetic variation
4. ARINC 429 label 320 from Garmin GDU, corrected for local magnetic variation
5. ARINC 429 label 314 from INS/IRU
6. ARINC 429 label 314 from Data Concentrator
7. ARINC 429 label 320 from INS/IRU, corrected for local magnetic variation
8. ARINC 429 label 320 from Airdata/AHRS, corrected for local magnetic variation
9. ARINC 429 label 320 from Garmin GAD 42, corrected for local magnetic variation
10. ARINC 429 label 320 from Sandel EHSI, corrected for local magnetic variation
11. ARINC 429 label 314 from GAD 42
12. XYZ Synchro
13. ARINC 429 label 320 from Data Concentrator
14. ARINC 429 label 320 from Traffic Advisory, corrected for local magnetic variation
15. RS-232 bus from Shadin Fuel and Air Data Computer
16. RS-232 bus from WX-500
GTN 725/750 TSO Installation Manual
190-01007-02
Page 2-3
Rev. A
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