Please report any broken links or trouble you might come across to the Webmaster. Please take a moment to let us know so that we can correct any problems and make your visit as enjoyable and as informative as possible.

NavSource Online:
Section Patrol Craft Photo Archive


YNg-21 call sign:
Nan - Able - Fox - Queen

ex-Dreadnaught (YT-34)
ex-Dreadnaught (ID 1951)

Navy call sign (1919):
George - Quack - Boy - Tare


  • Built in 1917 by the Union Iron Works, San Francisco, CA for the Rolph Navigation and Coal Company of San Francisco
  • Acquired by the Navy 17 May 1917
  • Commissioned USS Dreadnaught (ID 1951), 31 January 1918 at Mare Island Navy Shipyard, Vallejo, CA
  • Reclassified as a Harbor Tug, YT-34 in 1920
  • Decommissioned 14 March 1922 and placed in service
  • Reclassified as a Gate Tender (non-self propelled), YNg-21, 7 October 1940
  • Struck from the Navy Register in September 1944 and destroyed.


  • Displacement 450 t.
  • Length 143'
  • Beam 28'
  • Draft 14' 10"
  • Speed 11 kts.
  • Complement 28
  • Armament: One 3" mount
  • Propulsion: Steam, one shaft.
    Click on thumbnail
    for full size image
    Size Image Description Source
    Dreadnaught 91k Underway, probably prior to her World War I era Naval service.
    U.S. Navy photo NH 94484
    Naval Historical Center
    USS Dreadnaught (YT 34)
    Dreadnaught 308k c. 1922
    Mare Island Navy Yard
    U.S. Navy photo
    Darryl Baker

    View the Dreadnaught (ID 1951)
    DANFS history entry located on the Naval Historical Center website
    Back To The Main Photo Index Back To the Patrol Craft/Gunboat/Submarine Chaser Ship Index Back to the Identification Numbered Vessel (ID) Photo Index Back to the Yard and District Craft Index Back to the District Harbor Tug (YT) Photo Index Back to the Gate Craft (Non-self propelled) - (YNg) Photo Index

    Comments, Suggestions, E-mail Webmaster

    This page created and maintained by Joseph M. Radigan
    All pages copyright NavSource Naval History