And how would it work on an actual navy vessel?
On an American naval vessel, the "Officer of the Deck" is in charge of the ship, on the bridge. The Captain doesn't spend all of his work day on the bridge in any case. Neither does the XO.
This wikipedia article give the general gist of that the OOD does.
During general humdrum operations, there may be no need for the Captain to set foot on the bridge for several days