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NavSource Online:
Motor Torpedo Boat Photo Archive


Call sign:
Nan - Queen - Easy - King

PT-631 served the Navies of the United States and the Soviet Union.

78' Higgins Motor Torpedo Boat:

  • Laid down 13 July 1944 by Higgins Industries, New Orleans, LA
  • Launched 23 August 1944
  • Completed 18 February 1945
  • Placed in service 19 February 1945 and assigned to Motor Torpedo Boat Squadron FORTY THREE (PTRon 43) under the command of Lt. Richard C. Morse, Jr., USNR
  • PTRon 43, assigned to Pacific Fleet, was decommissioned 23 March 1945 so that its boats might be transferred to the Soviet Union
  • Deck loaded on LST-1084 at New Orleans, LA for transit to Puget Sound Navy Yard
  • Arrived at Puget Sound 28 April 1945
  • Transferred to the Soviet Union 8 June 1945 at Seattle, WA and reclassified TK-857
  • Fate unknown.


  • Displacement 56 t.
  • Length 78'
  • Beam 20' 8"
  • Draft 5' 3"
  • Speed 41 kts.
  • Complement 17
  • Armament: One 40mm mount, two 21" torpedoes, two twin .50 cal. machine guns, one 37mm mount, two 5" rocket launchers and one 20mm mount
  • Propulsion: Three 4,500shp Packard W-14 M2500 gasoline engines, three shafts.
    Click on thumbnail
    for full size image
    Size Image Description Source
    PT-631 333k Replacement photo: 1 March 1945
    The forward gun is a army-type 37mm automatic. The rocket launchers fired 5" spin-stabilized rockets. Elevated guns further aft are four 0.50 Brownings and one 20mm Oerlikon; a 40mm Bofors can barely be seen right aft. Torpedoes were dropped from racks along the deck edge
    Photo from U.S Small Combatants: An Illustrated Design History by Norman Friedman
    Original photo: Jerry Gilmartin MMC(SW), USN, Ret.
    Replacement photo: Robert Hurst
    PT-631 272k Photo from U.S Small Combatants: An Illustrated Design History by Norman Friedman Robert Hurst

    There is no DANFS history available for PT-631
    Back To The Main Photo Index Back to the Patrol Craft/Gunboat/Submarine Chaser Index Back to the Motor Torpedo Boat (PT) Photo Index

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    This page created by Joseph M. Radigan and maintained by Tom Bateman
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