Is Bagram a defensive airfield?
The supply requirements of a floating airfield will be just the same as those of a land airfield, in fact probably more, when you factor in ship-specific operational and maintenance requirements.
And because of that mutual support, they're not really as cheap as you think they are.:smilewink:
I think in my example I made it clear that planes would already be based on the island and if you had maybe a dozen islands to defend, separated by thousands of miles, as the UK does, then it might make sense to have a carrier.
The only way to foul GPS is to jam it or take out the satellites. The satellites are at an altitude of 20,200km, so that leaves us with jamming. That's why cruise missiles also have TERCOM and IBN typically. Lasers are pretty easy to mess up too in the case of LGBs.
You still need infrastructure to support aircraft on a carrier and you have to support the carrier itself, plus the 'mutual support' ships.
I'm a straight thinker, I see defence as defence and attack as attack.