I assume from that post you're not a Navigator or ever had the good fortune to use one? (fnar fnar).
A GPS is all well and good - but sh*t in, sh*t out, I'm afraid to say! I think I would rather have a mandraulic system and a machine for gross error checking- especially in a tactical aircraft or for fine-cutting oceanics trips.
Also - most aircraft that carry a Nav are the legacy fleets - how easy is it to get a mod through the IPT these days - cutting holes in pressure shells for cables for a GPS aerial is likely to get through well after the OOS date for the platform.
Interesting choice of words 'bin' - I'd be a little careful as there are now a lot of Navs (not just the old and bold) off a certain MPA who have an uncertain future that may involve redundancy and other bad words.
Just remember these guys are professionals as well as the Pilots.
Slightly ranty, but some of my best mates are Navs...
