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NavSource Online:
Motor Torpedo Boat Photo Archive

HM MTB-315

Call sign:
Nan - Able - William - Uncle


PT-57 served the Navies of Great Britain and Italy

77' Elco Motor Torpedo Boat:

  • Originally planned as Motor Boat Submarine Chaser, PTC-25
  • Reclassified PT-57 in June 1941
  • Laid down 18 July 1941 by the Electric Boat Co., Elco Works, Bayonne, NJ
  • Reclassified BPT-9 later that month
  • Launched 30 September 1941
  • Completed 7 March 1942 and transferred to Great Britain
  • Reclassified HM MTB-315, 5 June 1942 and assigned to the 15th MTB Flotilla
  • Returned to U.S. Navy custody 2 November 1945 and transferred to the State Department, Foreign Liquidation Commission
  • Transferred to Italy in February 1947 at Palermo, Sicily; reclassified as a Torpedo Recovery Craft and reclassified GIS-0020
  • Cannibalized for spares and scrapped.


  • Displacement 40 t.
  • Length 77'
  • Beam 19' 11"
  • Draft 4' 6"
  • Speed 41 kts.
  • Complement 15
  • Armament: Two twin .50 cal. Browning M2 machine guns in Dewandre turrets and two 21" torpedoes, one 40mm mount, one 20mm mount and two depth charges
  • Propulsion: Three 1,500shp Packard V12 M2500 gasoline engines, three shafts. and two depth charges
  • Propulsion: Three 1,500shp Packard V12 M2500 gasoline engines, three shafts.
    Click on thumbnail
    for full size image
    Size Image Description Source
    PT-57 81k HM MTB-315 .
    PT-57 153k HM MTB-315 underway in the Mediterranean. She is armed with a twin 0.5" Vickers Mark V mount abaft the bridge; two single 0.5" Browning machine guns on the forecastle; a single 20 mm Oerlikon aft, 2-21" torpedo tubes RN Pattern and 2-1 depth charges on a roll-off rack either side of the deck edge, aft of the Oerlikon mount
    Imperial War Museum photo from "Warships of World War II" by H. T. Lenton & J. J. College
    Robert Hurst
    PT-57 201k c. August 1942
    Deck plan and side profile from "Allied Coastal Forces of World War II: Vol. II" by John Lambert and Al Ross

    There is no DANFS history available for PT-57
    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 and maintained by Joseph M. Radigan
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