HMS Cachalot (N83)
History
United Kingdom
Name	HMS Cachalot
Builder	Scotts, Greenock
Laid down	12 May 1936
Launched	2 December 1937
Commissioned	15 August 1938
Fate	Sunk 30 July 1941
Badge
General characteristics
Displacement	1,810 tons surfaced 2,157 tons submerged
Length	293 ft (89 m)
Beam	25 ft 6 in (7.77 m)
Draught	16 ft 10 in (5.13 m)
Propulsion	2 shaft, Diesel (3300 hp) plus electric (1630 hp)
Speed	15.5 knots surfaced 8.75 knots submerged
Complement	59
Armament	6 × 21 inch (533 mm) torpedo tubes (bow) 12 torpedoes 1 × 4 inch deck gun 50 mines

HMS Cachalot (N83) was one of the six-ship class of Grampus-class mine-laying submarine of the Royal Navy. She was built at Scotts, Greenock and launched 2 December 1937. She served in World War II in home waters and the Mediterranean. She was rammed and sunk by the Italian torpedo boat Generale Achille Papa on 30 July 1941.

In August, 1940, Cachalot torpedoed and sank the German submarine U-51 in the Bay of Biscay and in September the German auxiliary minesweeper M 1604 / Österreich hit a mine laid by Cachalot and sank.^[1]

She was assigned to operate in the Mediterranean in 1941.

Cachalot left Malta on 26 July, bound for Alexandria. At 2 o’clock on the morning of 30 July the Italian torpedo boat Generale Achille Papa was spotted causing her to dive. Upon resurfacing she was attacked by the Italian vessel. Cachalot attempted to dive again but the upper hatch jammed, and the Italian destroyer rammed her. The crew scuttled the ship as they abandoned her and all personnel except for a Maltese steward were picked up by the Italians.^[2]

• Caruana, Joseph (2012). "Emergency Victualling of Malta During WWII". Warship International. LXIX (4): 357–364. ISSN 0043-0374.
• Colledge, J. J.; Warlow, Ben (2006) [1969]. Ships of the Royal Navy: The Complete Record of all Fighting Ships of the Royal Navy (Rev. ed.). London: Chatham Publishing. ISBN 978-1-86176-281-8.

• HMS Cachalot from uboat.net

32°49′N 20°11′E / 32.817°N 20.183°E / 32.817; 20.183