"QAVION....your man on the inside is correct. Keeping the IRUs in the align mode will not give a more accurate alignment at all."
That's not what I said at all, comxtek. In fact it <I>will</I> give a better alignment. That's precisely why it's done for high latitudes. NAV is only selected when 17 or so minutes has elapsed in ALIGN mode. The longer the better. The more precise the earth rate computation during align, the more precise the earth rate compensation in NAV mode.
I don't think anyone here said that it wouldn't???
A misunderstanding, perhaps?
Regards.
Q.