USS SC-21

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USS SC-21.jpg
History
United States
Name
  • USS Submarine Chaser No. 21 (1917-1920)
  • USS SC-21 (1920-1921)
BuilderNew York Navy Yard, Brooklyn, New York
Commissioned20 September[1] or 19 October[2] 1917
ReclassifiedSC-21 on 17 July 1920
FateSold 24 June 1921
General characteristics
Class and typeSC-1-class submarine chaser
Displacement
  • 77 tons normal
  • 85 tons full load
Length
  • 110 ft (34 m) overall
  • 105 ft (32 m) between perpendiculars
Beam14 ft 9 in (4.50 m)
Draft
  • 5 ft 7 in (1.70 m) normal
  • 6 ft 6 in (1.98 m) full load
PropulsionThree 220 bhp (160 kW) six-cylinder gasoline engines, three shafts, 2,400 US gallons (9,100 L) of gasoline; one Standard Motor Construction Company two-cylinder gasoline-powered auxiliary engine
Speed18 knots (33 km/h)
Range1,000 nautical miles (1,900 km) at 10 knots (19 km/h)
Complement27 (2 officers, 25 enlisted men)
Sensors and
processing systems
One Submarine Signal Company , , or hydrophone
Armament

USS SC-21, until July 1920 known as USS Submarine Chaser No. 21 or USS S.C. 21, was an SC-1-class submarine chaser built for the United States Navy during World War I.

SC-21 was a wooden-hulled 110-foot (34 m) submarine chaser built at the New York Navy Yard at Brooklyn, New York. She was commissioned on either 20 September[3] or 19 October[4] 1917 as USS Submarine Chaser No. 21, abbreviated at the time as USS S.C. 21, under the command of Lieutenant Alfred Y. Lanphier, who later would become the commander of the USS Patterson Group of submarine chasers.

Assigned to the Second Naval District, S.C. 21 operated with the Experimental Unit at New London, Connecticut. On 6 May 1918, Lieutenant, junior grade, Henry Hartley was relieved of command of and took command of S.C. 21.

When the U.S. Navy adopted its modern hull number system on 17 July 1920, Submarine Chaser No. 21 was classified as SC-21 and her name was shortened to USS SC-21.

On 24 June 1921, the Navy sold SC-21 to Joseph G. Hitner of Philadelphia, Pennsylvania.

Notes[]

References[]

  • This article incorporates text from the public domain Dictionary of American Naval Fighting Ships. The entry can be found here.
  • NavSource Online: Submarine Chaser Photo Archive: SC-21
  • The Subchaser Archives: The History of U.S. Submarine Chasers in the Great War Hull number: SC-21
  • Woofenden, Todd A. Hunters of the Steel Sharks: The Submarine Chasers of World War I. Bowdoinham, Maine: Signal Light Books, 2006. ISBN 978-0-9789192-0-7.


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