"Steven P. McNicoll" wrote in message
news:ze1ad.13857

Being off by 50' in cruise wouldn't be noticed.


OK, to be precise, 100'+/- is OK, and encoders click over at 51', right? So
you'd have to be 151' off for it to show as outside tolerance. Fly over some
building cumulus in a 172 sometime- that can left your skirts 100' before
you know it. Better have that altitude nailed or you've violated your
clearance.

-cwk.