In a word, no.

The U.S. Navy prides itself not only for its might but it's resourcefulness as well as its ability to adapt and change with fluid situations as they present themselves. I am confident that so long as the American people are able to provide the Navy with adequate men and materials, the U.S. Navy shall not falter even in the face of the most strident foe.

If we were to lose our machine shops and fuel depots though, things would be tougher, but we'd still manage to scratch something out of it.

The Royal Navy takes all hypothetical situations in consideration of our strategic planning, but as First Sea Lord I find myself wondering who would strike the American Navy at this time?

We may be alarmed at the sudden rise of American shipbuilding overtaking our traditional dominance, but their willingness to come to armament negotiation, and their help in the Great War against the submarine threat, surely shows them to be a reasonable and useful ally.

While the navy itself may be able to rebuild, there's just no desire for war in the US currently. American ships have already been sunk, American allies have been conquered, and the Americans have done nothing except declare economic embargoes. If their navy were wiped out they would obviously be quickly willing to negotiate and finally respect the Japanese sphere of influence.