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NavSource Online:
Submarine Chaser Photo Archive


Call sign:
Nan - William - Xray - Yoke


SC-683 served the Navies of the United States and Norway.

SC-497 Class Submarine Chaser:

  • Laid down 9 April 1942 by the American Cruiser Co., Trenton, MI
  • Launched 14 October 1942
  • Commissioned USS PC-683, 30 November 1942
  • Reclassified SC-683 in April 1943
  • Transferred to Norway 12 October 1945 and named KNM Hessa
  • During the war the U.S. loaned three American-built subchasers to occupied Norway under the lend-lease program and late in the war transferred ownership of the three vessels to Norway permanently. Throughout the war they
    were used in an operation called the "Shetlands Bus", a ferrying service between Norway and the Shetlands Isles which, at high risk, transported secret agents and communications equipment into Norway to enable them to
    keep track of German navy movements all along the Norwegian coast. On return trips the subchasers would take key Norwegian personnel back to the Shetlands and to freedom. After the war the three subchasers
    eventually disappeared
  • Transferred to the State Department, Foreign Liquidation Commission and sold to Norway 7 June 1948
  • Fate unknown.


  • Displacement 148 t.
  • Length 110' 10"
  • Beam 17'
  • Draft 6' 6"
  • Speed 21 kts.
  • Complement 28
  • Armament: One 40mm gun mount, two .50 cal. machine guns, two depth charge projector "Y Gun," and two depth charge tracks
  • Propulsion: Two 1,540bhp General Motors (Electro-Motive Div.) 16-184A diesel engines, two shafts.
    Click on thumbnail
    for full size image
    Size Image Description Source
    SC-683 63k . Historical Collections of the Great Lakes

    There is no DANFS history available for SC-683
    Additional Resources and Web Sites of Interest
    Patrol Craft Sailors Association
    Back To The Main Photo Index Back to the Patrol Craft/Gunboat/Submarine Chaser Ship Index Back to the 110' Submarine Chaser (SC) Photo Index

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    This page created by Gary P. Priolo and maintained by Tom Bateman
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