The Random thought thread

[old man emu]

1 hour ago, facthunter said:

 IF any Place is close to sea level, A  baro above 1013.2   by much will push it to below AMSL  pressure height. Nev

I agree with that. 

 

What caused me to pose the question was how would a pilot know how high the aircraft actually was aove ground if the DA gave a calculated location that was below ground level.

 

[rgmwa]

By setting 1040HPa on the altimeter assuming ground is effectively sea level (and temp =15 deg).