The C class was essentially a repeat of the preceding
B class, albeit with better performance underwater. 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 16-cylinder
Vickers petrol engine that drove one
propeller shaft. When submerged the propeller was driven by a
electric motor. 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. ==Construction and career==