...It's just that the Royal Navy didn't quite come to grips with this until some time after
Which makes life all the more interesting for historians comparing German and British naval logs against each other in retracing the battles; it's best to hold a mirror to one set of logs.
It might also have caused complications in convoy, because British military and merchant sailors switched between terminologies at different times after the war.
Another thing differentiating the sea from the outer space is that the horizon at least provides one absolute. If nothing else, it prevents one ship's port from being another's starboard when the two have the same heading; no such comfort for ships in space, with their ability to roll at will!