Originally Posted by
Flying Wild
SOP at my outfit is for full alignment on turnaround as per Boeing, this despite being fitted with dual GPS.
I would pose the question of when would you ever NOT have the time for a full alignment to be completed on a turnaround?
Having said that, having received the latest batch of NGs, they've got a Honeywell ADIRU issue which means that once initialised at the start of the day, they are left in NAV until the end of the day unless they are likely to have been operating for longer than 18 hours.