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NavSource Online:
Motor Torpedo Boat Photo Archive

HM MTB-420

Call sign:
Nan - William - Oboe - Queen

PT-90 served the Navies of Great Britain and Italy

78' Higgins Motor Torpedo Boat:

  • Laid down 2 June 1942 as PT-90 by Higgins Industries, New Orleans, LA
  • Launched 28 October 1942
  • Completed 18 December 1942
  • Transferred to the Soviet Union 15 February 1943 as RPT-6
  • Transfer canceled due to Spring convoys to the Soviet Union being halted
  • Transferred in April 1943 to Great Britain and commissioned HM MTB-420 and assigned to the 7th MTB Flotilla
  • Returned to U.S. Navy 8 September 1945
  • Struck from the Naval Register 17 April 1946
  • Transferred to Italy in February 1947 at Palermo, Sicily
  • Transferred to the State Department, Foreign Liquidation Commission in January 1948
  • Reclassified GIS-0022, 4 April 1948
  • Reclassified GIS-843, 1 April 1951
  • Reclassified as a Torpedo Boat MS-824, 1 November 1952
  • Reclassified MS-443, 1 January 1954
  • Stricken 31 October 1985
  • Fate unknown.


  • Displacement 56 t.
  • Length 78'
  • Beam 20' 8"
  • Draft 5' 3"
  • Speed 40 kts.
  • Complement 17
  • Armament: Four 21" torpedoes, one 40mm mount and two twin .50 cal. machine guns
  • Propulsion: Three 1,500shp Packard W-14 M2500 gasoline engines, three shafts.
    Click on thumbnail
    for full size image
    Size Image Description Source
    PT-90 125k c. 1953
    Italian Navy photo from the 1954/1955 edition of Jane's Fighting Ships
    Robert Hurst
    PT-90 103k c. 1955
    Valetta, Malta
    Photo courtesy of A & J Pavia from Jane's Fighting Ships
    Robert Hurst
    PT-90 115k c. 1963
    Photo by Giorgio Arra from the 1964/1965 edition of Jane's Fighting Ships
    PT-90 383k 22 February 1979
    La Spezia, Italy
    Carlo Martinelli

    There is no DANFS history available for PT-90
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    This page created by Joseph M. Radigan and maintained by Tom Bateman
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