Brian Gaff wrote:

You don't want to be recovering complex engines from the sea though, so you
would need to launch them from a place where the recovery could be inland.

Eventually they would be recovered at the dry land launch site two hours
after launch, but you want everything right away, dontcha! Impatience!

Tin hats anyone?

Boeing has already successfully demonstrated the water recovery of an
SSME. So I guess I'm just standing on the toes of giant's, am I not?

So go ahead, giant, give launch vehicle architecture your best shot.

You might be a giant.