OK, nice try, but as in the RAF thread you got a sensible and well reasoned answer from WeekendFlyer.
ASW and convoy protection: Not particularly relevant right now, but the number of navies with submarines is rapidly increasing and one day we may need that capability again. Don't ever forget the lessons of WW2; if you lose control of the sea lanes in the place you need to operate, things can get an awful lot harder, or even impossible. Again, there is a role for airborne ASW platforms, but they complement the Navy, they can't replace it.
And to this just: