HMS C19 was one of 38 C-class submarines built for the Royal Navy in the first decade of the 20th century. The boat survived the First World War and was sold for scrap in 1920.
The C-class boats of the 1907âÂÂ08 and subsequent Naval Programmes were modified to improve their speed, both above and below the surface. The submarine had a length of overall, a beam of and a mean draft of . They displaced on the surface and submerged. The C-class submarines had a crew of two officers and fourteen ratings.
For surface running, the boats were powered by a single 12-cylinder Vickers petrol engine that drove one propeller shaft. When submerged the propeller was driven by a electric motor. They could reach on the surface and underwater. On the surface, the C class had a range of at .
The boats were armed with two 18-inch (45 cm) torpedo tubes in the bow. They could carry a pair of reload torpedoes, but generally did not as they would have to remove an equal weight of fuel in compensation.
C19 was laid down on 1 June 1908 by Vickers at their Barrow-in-Furness shipyard, launched on 20 March 1909, and completed on 9 November. During World War I, the boat was generally used for coastal defence and training in home waters. C19 was sold for scrap on 2 February 1920.