HMS Untiring

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HMS Untiring.jpg
United Kingdom
Name: HMS Untiring
Builder: Vickers Armstrong, Newcastle upon Tyne
Laid down: 23 December 1941
Launched: 20 January 1943
Commissioned: 9 June 1943
Out of service: Loaned to Greek Navy from July 1945
Identification: P59
Fate: sunk as ASDIC target 25 July 1957
UNTIRING badge-1-.jpg
Name: Xifias
In service: July 1945
Out of service: Returned to Royal Navy in 1952
Identification: Y-10
General characteristics
Class and type: U-class submarine
  • Surfaced - 540 tons standard, 630 tons full load
  • Submerged - 730 tons
Length: 58.22 m (191 ft 0 in)
Beam: 4.90 m (16 ft 1 in)
Draught: 4.62 m (15 ft 2 in)
  • 2 shaft diesel-electric
  • 2 Paxman Ricardo diesel generators + electric motors
  • 615 / 825 hp
  • 11.25 kn (20.84 km/h; 12.95 mph) max surfaced
  • 10 kn (19 km/h; 12 mph) max submerged
Complement: 27-31

HMS Untiring (P59) was a Royal Navy U-class submarine built by Vickers-Armstrong. So far she has been the only ship of the Royal Navy to bear the name Untiring. After the war, she was loaned to the Greek Navy and renamed Xifias (Y-10).

Wartime career[edit]

After a work up patrol off the Norwegian coast, where she sank the Norwegian fishing vessel Havbis II whilst she was fishing for halibut, Untiring was assigned to operate in the Mediterranean. Here, she went on to sink the German netlayer Netztender 44/Prudente, the German barge F 296, the German ships Jean Suzon/FP 352 and St. Antoine/FP 358, the German auxiliary minesweeper M 6022/Enseigne, the German merchants Diana and Siena (the former French Astrée), the German auxiliary submarine chasers UJ 6075 / Clairvoyant and UJ 6078/La Havraise, and also claimed to have sunk a sailing vessel with gunfire.

She also unsuccessfully attacked the German submarine U-616, the German auxiliary submarine chaser UJ 6073/Nimeth Allah, the German torpedo boat TA18 (the former Italian Solferino), the German merchant Burgas and an unidentified German auxiliary patrol vessel.

Greek service[edit]

Untiring survived the war and was loaned to the Greek Navy in July 1946, where she was renamed Xifias. She served with the Greek Navy for seven years, and was returned to the Royal Navy in 1952. She was subsequently sunk as an ASDIC target on 25 July 1957. The wreck sits upright in 53 metres of water in an area of generally reasonable visibility and is easily reached from Salcombe or Plymouth. She is still in very good condition with little sign of collapse over the years since she was sunk. The boat lists slightly to port and the propellers are still both visible above the loose gravel of the bottom.[citation needed] It is regularly dived by local and visitors. The boat has a good collection of growth on her and is home to numerous species of fish.[citation needed]


  • Innes McCartney (2002). Lost Patrols: Submarine Wrecks of the English Channel.
  • "HMS Untiring (P 59)".
  • "Untiring to Urge". British submarines of World War II. Archived from the original on 11 July 2007.
  • 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. OCLC 67375475.
  • Hutchinson, Robert (2001). Jane's Submarines: War Beneath the Waves from 1776 to the Present Day. London: HarperCollins. ISBN 978-0-00-710558-8. OCLC 53783010.