Radio-controlled battleship HMS Centurion is used for firing practice in the North Sea.
Full titles read: "The Robot Battleship - With our Navy in the North Sea." (new title) "The first line of defence - the steel shield of the Empire."
Various shots of a battleship at sea.
Intertitle reads: "For many years firing practice has usually meant this kind of target."
Various shots of a latticework target used for firing practice; it is moored in the sea, some distance from the battleship. Voiceover gives us more details about the target. Brief shot of men climbing aboard a ship from a boat.
Intertitle reads: "Today sees the entrance of the wireless-controlled Battleship, H.M.S. Centurion - the Robot of the Seas - as a moving target. (and shown for the first time in a Pathetone film.)" - may be incorrect as title is obscured by timecode.
L/Ss of destroyer HMS Chicari (?) alongside HMS Centurion, taking on board the crew, before firing practice. Voiceover tells us Centurion is now a robot ship, controlled by wireless from the destroyer.
Intertitle reads: "Miles away the great ships are shooting at her, as she steams along, without a single person on board, entirely controlled by radio."
Various shots of the Centurion being used for target practice as explosives land around her.
Intertitle reads: "So the day ends and once more the North Sea resumes a calmer look."
Several shots of warships moving over the water.
(Followed by Pathetone end titles.)