The X.1. submarine leaves Chatham in Kent, good shots as it sails along.
Item title reads - Dreadnought of the under seas. X.1. - our super-submarine cost £842,000 - displaces 3500 tons - 350 feet long - with crew of 121 - leaves Chatham. Kent.
L/S as the submarine sails slowly out of the harbour with the crew on deck, the camera follows it. L/S as it speeds along in the sea.
Intertitle - 'Look back into 1912 (The C. boats were considered wonderful then!)' M/S of a C.35 submarine in the water, the camera pans around it.
Intertitle - 'The X.1. can remain submerged for 2 1/2 days!!' The camera pans across the submarine with the crew on deck. M/S of the front of the submarine and across the length of it. C/U of the side, sailors talk on deck.
Various shots as it sails along on the water. The intertitle is repeated and we see a shot of C.35. again and then the X.1. Various shots as the submarine sails along.