"Then you still don't need a "navigator" in an NH90.... without GPS is not a major issue, as I'm sure an NH90 has an INS which will keep its position accurate within a few hundred meters over a couple of hours flying..."
....which is more than enough to put you the wrong side of disputed border in that part of the world.....nothing like expecting to see a feature inside another (not exactly friendly....) country turn up in the 10 o'clock when you were expecting to see it in the 2 o'clock while flying north up a border....
Crab, yep, we had navs on Chinooks, but there were also plenty on Puma, Wessex and Merlin. Many came from the V-Force, others from FJs such as the F4 at OSD. We also trained ab initio navs for a while as they were quicker/cheaper to train than pilots and we were short on numbers in the late 90s.