DONE:_))(A:SIM ON GROUND,bool) (A:Ground velocity, feet per second) 0 == && if{ (A:Radio height, feet) (>L:aircraftheight,feet) } (A:Radio height, feet) (L:aircraftheight,feet) - (>G:Var9) Thanks for the logic Bill.Steve

>DONE:_))>Thanks for the logic Bill.You're welcome! Sorry 'bout all the "false starts..."That's what happens when I try to post late at night... :)

Well,Late at home, work in progress....., looking through my HUD on the ground: Altimeter 0.000?!The used code was: (A:SIM ON GROUND,bool) if{ (A:Radio height, feet) (>L:radalt,feet) }Altimeter (below 2500 ft}:%((A:Radio height, feet) (L:radalt,feet) - )%!d!The code was there since....??, probably forgotten.Jan"Beatus Ille Procul Negotiis"

>Hallo,>>Didn't follow the discussion thoroughly, but i use for>Radioalt:Yep, but the OP was looking for an "automatic way" to determine the value for the delta offset.By reading the value return of Radio Height, feet while on the ground and stationary, the he can now give his delta offset an exact value, irrespective of which a/c the radar altimeter is installed in... :)