"R" Class Submarine (1918)

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R 7, probably upon her acceptance for service.[1]

A total of ten "R" Class Submarines were completed for the Royal Navy, especially designed to hunt other submarines.

Two units, R 5 and R 6, were cancelled.


By war's end, all boats of "E" class and later were given 3 kilowatt Poulsen wireless sets, affording ranges of 200 miles submarine-to-submarine, and 300-400 miles between shore stations and submarines. Reception of shore stations of 400 miles was common, and high power shore stations could be received over 500-600 miles.[2]


  • six 18-in tubes forward, twelve torpedoes


See Also


  1. The Technical History and Index, Vol. 3, Part 21. Plate 13.
  2. The Technical History and Index, Vol. 3, Part 21. pp. 16-17.
  3. The Technical History and Index, Vol. 4, Part 28. p. 19.


  • Gray, Randal (editor) (1985). Conway's All the World's Fighting Ships 1906–1921. London: Conway Maritime Press. (on Amazon.com and Amazon.co.uk).

"R" Class Submarine
R 1 R 2 R 3 R 4 R 7
R 8 R 9 R 10 R 11 R 12
<– "M" Class Submarines (UK) Oxley Class –>