Aircraft Systems
AVIONICS
AL250 Flight Manual
MEP
6-7-3 GARMIN GTN 650
Available as an option, is an original Garmin GTN 650. The Garmin GTN 650 connec ts
to the autopilot, but all information regarding the aircraft position and speed are
received from ALSIM’s flight model program. Therefore the GNS displays the current
aircraft position at the same position as shown on the Instructor Station map.
Figure 6.39: Garmin GTN 650
The GNS turns on automatically when the power supply is available. When the self
test has been completed, ‘CONTINUE’ (on screen) must be pushed twice to activate
the GNS.
The GNS includes, amongst others, the NAV 1 and COM 1 functions and is also
configured with XPDR functionality.
In VLOC mode the GNS works like a NAV receiver with actual existing beacons. In
GPS mode, the autopilot can perform LPV and LNAV/VNAV SBAS approaches if the
autopilot APPROACH mode is engaged, GPS signal quality and satellite geometry are
appropriate for this flight phase:
• LPV: HAL = 0NM, VAL = 0m, HFOM <= 10m, VFOM <= 10m
• LNAV/VNAV: HAL = 0.3NM, VAL = 50m, HFOM <= 10m, VFOM <= 10m
NOTE
See the Garmin GTN 650 Pilot’s Guide for a complete
description of the GNS.
Rev. 1.8 © 2021 ALSIM - All Rights Reserved 6-39
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