I have the perfect solution for Pompey's harbour. Equip a car ferry with catapults in the car hold, and a platform with arrestor wires on top a la the early carriers converted from colliers etc. Fling 'em out the front of the car deck, get them to land on the flat bit on top. Fits snugly in the harbour, and what's more can also ferry troops and equipment overseas. Between cruises the Navy can get a bit of the investment capital back on cross-channel runs... CVRORO anyone?