U.S.S. Rock (SS 274)

© Photographed August 22, 2015
Erected by The Manitowoc Company
Manitowoc, Manitowoc County, Wisconsin
44.092595,-87.655628
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U.S.S. ROCK
(SS 274)
Keel Laid 23 December 1942
Launched 20 June 1943
Commissioned 26 October 1943
On 6 February 1944 the U.S.S. ROCK departed Pearl Harbor to begin her first patrol. The ROCK was credited with sinking 1 vessel and damaging 42,282 tons of shipping during her 6 patrols. She was decommissioned on 1 May 1946. In 1951 the ROCK was converted to a Migrain III type radar picket submarine. On 12 October 1953 she was recommissioned, and on 23 July 1954 she departed San Diego to begin the first of 4 tours of duty in the western Pacific. She was stricken from the Naval Register in 1969.
The marker is located on the north bank of the Milwaukee River, on The Manitowoc County 28 Boat Memorial Walk, adjacent to the U.S.S. Cobia (a National Historic Landmark), at the Wisconsin Maritime Museum, at 75 Maritime Drive, Manitowoc, Wisconsin 54220.


From modest beginnings in 1902 as a small shipbuilding and ship-repair company  in Manitowoc, Wisconsin, through two world wars building ships and submarines for the U.S. Navy, to today – a  global leader in cranes and foodservice equipment – The Manitowoc Company is here to stay. The vision of Manitowoc’s  founding fathers, coupled with its core values of Integrity, Commitment to Stakeholders, and Passion for Excellence,  have made Manitowoc a strong, respected organization throughout the world.  The Manitowoc team is Building Something Real for its customers, investors, employees, and partners with over 100 manufacturing, service, or distribution facilities in 20 countries. 

Publication compiled by Dan Ross’ history classes, Kewaskum High School, 2008




The U.S.S. Rock (SS 274) marker is on the right.

Negative of the Rock (SS-274) underway, circa 1960's
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runs the length of the U.S.S. Cobia (visible in the background).


is located in Manitowoc, Wisconsin.

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