In article , Robert Moore
writes:

Reset the altimeter passing through FL180 going up or down.
However, I hope I am not sucking oxygen as this would be
indicative of a major malfunction. :-)


Ah, I forgot to mention that I do this in the continental US.
The rules, of course, are different alsewhere.

How do you know that you are passing FL180 on the way up?


Ok, let's try this. In the continental US, I set the altimeter to 29.92 at or
near 18,000' in the climb and passing through about FL180 in the descent. No
conflict with traffic should occur since an aircraft will not be assigned and
altitude of FL180 if the current barometric pressure is less than 29.92. It is
not necessary to be exacting in this. Just be sure to have the correct
altimeter setting in the window when approaching the assigned altitude to avoid
traffic and/or terrain conflicts.

However, should I desire to know that I am passing FL180 in the climb, and
since I a have three altimeters at my disposal, I could set one to 29.92 to
indicate my current FL.

G. Lee