Military Wiki
USS Suncook (AN-80)
Career (USA) Union Navy Jack
Name: USS Suncook
Builder: Commercial Iron Works, Portland, Oregon
Laid down: 30 November 1944 as Suncook (YN-99)
Launched: 16 February 1945
Sponsored by: Mrs. Laura B. Stephenson
Commissioned: 5 May 1945 as USS Suncock (AN-80)
Decommissioned: 12 June 1947, at Astoria, Oregon
Reclassified: AN-80, 17 January 1945
Struck: 1 September 1962
Fate: transferred to MARAD in September 1962; sold for scrapping, 28 July 1971
Notes: used as a research vessel by the U.S. Bureau of Mines, and renamed Grass Valley
General characteristics
Type: Cohoes-class net laying ship
Displacement: 775 tons
Length: 168' 6"
Beam: 33' 10"
Draft: 10' 10"
Propulsion: Diesel direct drive, 2,500hp, single propeller
Speed: 12.3 knots
Complement: 46 officers and enlisted
Armament: one single 3"/50 gun mount, four single 20mm gun mounts

USS Suncook (YN-99/AN-80) was a Cohoes-class net laying ship which was assigned to protect U.S. Navy ships and harbors during World War II with her anti-submarine nets. Her World War II career was short lived; however, after decommissioning, she was reactivated in 1962 for use as a research ship for the U.S. Bureau of Mines, where she served as the Grass Valley.

Constructed at Portland, Oregon

Suncook (AN-80) was laid down at Portland, Oregon, on 30 November 1944 by the Commercial Iron Works; launched on 16 February 1945; sponsored by Mrs. Laura B. Stephenson; and commissioned on 5 May 1945, Lt. Robert C. Ramey, USNR, in command.

World War II service

She conducted shakedown and training off the California coast until 8 July, when she departed for Pearl Harbor. From there, she was routed on to Eniwetok Atoll in the central Pacific Ocean. She arrived at the huge anchorage on 1 August, just two weeks before the cessation of hostilities. There she tended nets for the next seven months, making one round-trip voyage to Ponape and back in December 1945.

Post-war service

In March 1946, she sailed to Guam in company with Shakamaxon and after two weeks there, continued on to Bikini Atoll in the Marshall Islands, where she arrived on 30 March.

Suncook remained in the vicinity of Bikini and Kwajalein Atolls until September, supporting the atomic bomb tests known as Operation Crossroads. On 2 September, she cleared the area and sailed via Pearl Harbor to the U.S. West Coast. She reached Seattle, Washington, on 30 September and remained there until June of the following year, undergoing radiological clearance.

Post-Navy service and disposition

In January 1947, she was placed in reserve, but remained in commission. On 10 June, she departed Seattle, Washington, and arrived, two days later, in Astoria, Oregon, where she was placed out of commission. She remained with the "mothball" fleet until August 1961, when custody was transferred to the U.S. Maritime Administration.

In September 1962, she was again transferred, this time to the U.S. Bureau of Mines for use as a research ship at the Marine Mineral Technology Center at Tiburon, California.

Re-named Grass Valley

Her name was struck from the Navy List on 1 September 1962 and she became the research vessel, Grass Valley. She served under that name until returned to the Navy for disposal on 18 June 1968. On 28 July 1971, her hulk was sold to the Waterman Supply Co., Wilmington, California.


The vessel was built as the USS Suncook, but was commissioned as the USS Suncock.


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