Leon,
very little nav on ops. Big line of mountains East to West, river North to South at one end, city of Kandahar dwarfed by massive airbase at the other.
Most of the time it's IP to grid work once in the green zone and by that point the NCA are firmly nailed to the trigger [for good reason].
However, I know ex-SH crewmen who now reside in both seats of GR4's - so it isn't some mystical art.
Manning up the General and dishing out the mars bars? - I think you need to get out more.
Airpolice - Yes, at much lower speeds.