Originally Posted by
applecrumble
Are you able to elaborate please Capn Bloggs
Terrain function -> calibrated gain -> tilt-8.25 degrees(for a 3.5 beam like A320 WX radar antenna). The distance at which you notice the first returns, is your height above the ground in 1000 ft.
If WX radar inop, you can depressurize your cabin (provided you stay below 10000ft) and read the cabin altitude(adjust the value for non standard QNH).