HMS D2 was one of eight D-class submarine built for the Royal Navy during the first decade of the 20th century.

[2] For surface running, the boats were powered by two 600-brake-horsepower (447 kW) diesels, each driving one propeller shaft.

On the surface, the D class had a range of 2,500 nautical miles (4,600 km; 2,900 mi) at 10 knots (19 km/h; 12 mph).

Then, two days before D2 met her fate, Lieutenant Commander Jameson was washed overboard off Harwich.

D2 was rammed and sunk by a German patrol boat off Borkum on 25 November 1914, leaving no survivors.