Thread creep, but I wonder....
We do a lot of oceanic work on comany preferred routes (off the airways, taking best advantage of winds). On an SFO/AKL, for example, we may be on an airway for only an hour or so (where it suits the winds). At other times, we are crossing/paralleling(sp?) or nowhere near airways.
I recon that a preconceived decision to turn off 90 could increase risk. I brief accordingly.