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NavSource Online: Mine Warfare Vessel Photo Archive

HM BYMS-2278
ex-HM J-1078

BYMS-2278 served the Navies of Great Britain and Italy.

YMS-1 Class Auxiliary Motor Minesweeper:

  • Laid down 11 March 1943 as YMS-278 by the J. M. Martinac Shipbuilding Co., Tacoma, WA
  • Launched 17 July 1943
  • Completed 12 November 1943, transferred to Great Britain and reclassified HM J-1078
  • Reclassified HM BYMS-2278
  • Struck from the Naval Register 28 August 1947, transferred to Italy and named Primula (DR 407)
  • Reclassified M-5413
  • Transferred to the State Department, Foreign Liquidation Commission November 1947
  • Struck from the Italian Navy list in 1967
  • Fate unknown.


  • Displacement 270 t.
  • Length 136'
  • Beam 24' 6"
  • Draft 8'
  • Speed 15 kts.
  • Complement 32
  • Armament: One 3"/50 dual purpose gun mount, two 20mm mounts, and two depth charge projectors
  • Propulsion: Two 880bhp General Motors 8-268A diesel engines, Snow and Knobstedt single reduction gear, two shafts.
    Click on thumbnail
    for full size image
    Size Image Description Source
    HM BYMS-2278
    BYMS-2278 62k Tommy Trampp
    Primula (M 5413)
    BYMS-2278 63k c. 1956
    From the collection of Giorgio Parodi
    Navi e Armatori (Ships and Shipowners)

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