Royal Navy — Submarine
HMS Ultimatum
Service
- as HMS Ultimatum29 July 1941 — 23 December 19491,497 days of the war
U-class submarine
Particulars
- Name
- HMS Ultimatum
- Builder
- Vickers-Armstrongs, Barrow-in-Furness
- Laid down
- 19 June 1940
- Launched
- 11 February 1941
- Commissioned
- 29 July 1941
- Fate
- Sold for scrap on 23 December 1949, broken up 1950 (1949)
- Status
- Scrapped
Specifications
- Displacement, surfaced
- 540 long tons (549 t)
- Displacement, submerged
- 730 long tons (742 t)
- Length
- 58.22 m (191 ft)
- Beam
- 4.9 m (16.1 ft)
- Draught
- 4.62 m (15.2 ft)
- Speed
- 11.3 knots (20.8 km/h, 12.9 mph)
- Complement
- 27
- Main gun
- 76 mm (3 in)
HMS Ultimatum was a U-class submarine, operated by the Royal Navy. Her keel was laid at Vickers-Armstrongs, Barrow-in-Furness on 19 June 1940. She entered service on 29 July 1941, having been launched on 11 February 1941.
She was one of 53 ships of her class.
The boat displaced 540 long tons surfaced and 730 long tons submerged. She measured 58.2 m (191 ft) long with a beam of 4.9 m (16 ft). Her designed speed was 11.2 knots, and she carried a complement of 27. Her main battery was of 76 mm (3.0 in) calibre.
She was in commission for 1,497 days of the Second World War.
She was broken up for scrap on 23 December 1949.
Written from the harvested record. Every figure above is sourced; the wording is this site's own.
Armament and machinery
Armament and machinery
- Propulsion
- 2 shaft diesel-electric
- 2 Paxman Ricardo diesel generators + electric motors
- 615 / 825 hp
- Armament
- 4 bow internal 21 inch (533 mm) torpedo tubes - 8 - 10 torpedoes
- 1 - 3 in gun
Sister ships
- French submarine Curie (P67)
- HMS P32 (1940)
- HMS P33 (1941)
- HMS P36 (1941)
- HMS P38 (1941)
- HMS P39
- HMS P47
- HMS P48 (1942)
- HMS Ultor
- HMS Umbra
- HMS Umpire (N82)
- HMS Una
- HMS Unbeaten
- HMS Unbending
- HMS Unbroken
- HMS Undaunted (N55)
- HMS Undine (N48)
- HMS Union (N56)
- HMS Unique (N95)
- HMS Unison
- HMS United
- HMS Unity (N66)
- HMS Universal
- HMS Unrivalled
Sources
- Facts harvested from HMS Ultimatum on Wikipedia. Figures only — no wording is taken from it.
- Photograph: Beadell, S J (Lt) Royal Navy official photographer — This photograph A 18836 comes from the collections of the Imperial War Museums (collection no. 4700-01) — Public domain — Wikimedia Commons