Originally Posted by TP
shortfuel's IRS drift remarks are valid.
- crikey! I will definitely stick to Boeing, then.
I've never seen an 'IRS Drift' which will take me off an ILS in the few minutes I am tracking the LOC (not since the Harrier GR3's rubber band map system which used to leg it into East Germany at high speed with monotonous regularity)..... + of course, FMC position update negates IRS drift, surely?
PS What is 'bird'...?