Ah!! Gotcha. Well on all B757's I have flown anything below 0 on the RDH causes the numbers on the EADI to dissappear!
I would suggest that a negative setting on the EADI would be pointless, as surely you would have landed gear up before it called anything!!??!!
Sorry Alex, but I have never seen the actual radalt read -20! I have seen -6 or so, but you have a BIG problem if it is showing -20 on the ground.
Eff Oh
