Apparently it's not a quick or simple feature, but it's under advisement.
If it were up to me:
Numpad 5: Maint'gallant mast head panorama view
Numpad 2: Helmsman. quarterdeck or poop deck view, depending on vessel
Numpad 8: Fore fighting top view
Make the bow chaser use a perspective from the forecastle and suddenly we don't need the current floating viewpoint anymore, except for a vanity camera.
This will be more immersive and mean that we spend more time on the deck of ships, instead of looking through or around them.