Since SH3 already had the ability to link a key or shortcut to bring you to the captain's bed and radioroom, I wonder if it is still there in SH4 -I suspect so, since it's still there in the U-Boats part of the game IIRC- and can be linked to captain's cabin in your fantastic project (And a radioroom later).
It would be awesome to walk around the fleet boat and be able to rest in the bed while listening to the radio