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Unnumbered Vessel Photo Archive

UST Thomas Blackhorne
ex-HMT Thomas Blackhorne (FY 3606)

Thomas Blackthorne served the Navies of Great Britain and the United States

Castle Class Trawler:

  • Built in 1917 by Cook, Welton, and Gemmell, Ltd., Beverley, England
  • Launched 6 June 1918
  • Placed in service as HMT Thomas Blackhorne (FY 3606)
  • Leased to the U.S. Navy in May 1919
  • Commissioned UST Thomas Blackhorne 16 May 1919 at Falmouth, England
  • Decommissioned 6 October 1919 at Brighton, England and returned to the Admiralty
  • Sold in 1922 and renamed Alexandrite
  • Wrecked in 1923.


  • Displacement 269 t.
  • Length 125' 5"
  • Draft 12' 7"
  • Speed 10 kts.
  • Complement 17
  • Armament: One 12-pounder
  • Propulsion: One boiler, one 480hp vertical triple expansion reciprocating steam engine, one shaft.
    Click on thumbnail
    for full size image
    Size Image Description Source
    Thomas Blackthorne 105k Photo from "Sweeping the North Sea Mine Barrage by the U.S. Navy North Sea Minesweeping Detachment" Joe Radigan

    Commanding Officers
    01LT Floyd Scofield, USNRF1919
    Courtesy Joe Radigan

    View the Thomas Blackthorne
    DANFS history entry located on the Naval History and Heritage Command website
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