The DME shows ground distance rather than slant distance.
Steps to reproduce
Fly close enough to a VOR that the altitude difference will matter, say 10-20 nm. Also program the DME station in the FMS, either as a direct or on the FIX page to see the GPS distance. Note that the DME on the bottom left/right of PFD matches the GPS distance.
Expected behaviour
For the DME to show slant range rather than ground range. For example (screenshot below), if the GPS distance to a DME is 10.9NM and your flying at 36000 ft, the DME should show 12.4NM rather than 10.9.
Describe the bug
The DME shows ground distance rather than slant distance.
Steps to reproduce
Fly close enough to a VOR that the altitude difference will matter, say 10-20 nm. Also program the DME station in the FMS, either as a direct or on the FIX page to see the GPS distance. Note that the DME on the bottom left/right of PFD matches the GPS distance.
Expected behaviour
For the DME to show slant range rather than ground range. For example (screenshot below), if the GPS distance to a DME is 10.9NM and your flying at 36000 ft, the DME should show 12.4NM rather than 10.9.
Evidence
From World FCOM vol 3 INST-10.4
Simulator
Microsoft Flight Simulator 2020 (MSFS)
Crash
No
Phase of flight
Cruise
Altitude
36000
Agreement