Skip to main content
Naval History and Heritage Command

Naval History and Heritage Command

Related Content
Document Type
  • Ship History
Wars & Conflicts
File Formats
Location of Archival Materials

Butternut (YN-4)


An American tree of the walnut family. 

(YN-4: displacement 700 (full); length 151'8"; beam 30'6"; draft 10'6"; speed 14 knots; complement 40; armament 1 3-inch; class Aloe)

Butternut (YN-4) was laid down on 11 March 1941 at Houghton, Wash., by the Lake Washington Shipyard; launched on 10 May 1941; and placed in service at the Puget Sound Navy Yard, Bremerton, Wash., on 3 September 1941, Lt. Andreas S. Einmo, USNR, in charge.

After fitting out at Puget Sound Butternut began service with the Inshore Patrol, 13th Naval District, early in October 1941. She tended antisubmarine nets and performed minesweeping tasks until May 1942. On 13 May 1942, Butternut was placed in commission at Seattle, Lt. Andreas S. Einmo, USNR, in command.

The ship departed Seattle on 17 May 1942 for a brief visit to San Francisco, Calif., until 1 June when she got underway for the southwestern Pacific. After escorting the U.S. freighter Eldridge Gerry, Butternut arrived in Noumea, New Caledonia, on 27 June. For 18 months, she tended nets in the southwestern Pacific, first at New Caledonia, later in the New Hebrides, and then in the Solomons. Her active service was interrupted only by two repair periods--August and September of 1943 at Port Chalmers, New Zealand, and November 1943 to February 1944 at Pearl Harbor. During her overhaul at Pearl Harbor, Butternut was reclassified a net laying ship and was redesignated AN-9. In January 1945, the ship steamed from the Solomons via Humboldt Bay, New Guinea, to Leyte in the Philippines. She spent the ensuing two years engaged in net and other district craft operations in the waters adjacent to the islands of Leyte and Samar.

Butternut departed Leyte Gulf in convoy on 24 February 1947 and shaped a course for the Marianas. She arrived at Guam on 9 March and began three years of service in the Trust Territories of the Pacific Islands. Based at Apra Harbor, Guam, she carried passengers and cargo among the islands as well as laying and tending nets at various islands. The ship also performed several assignments off Iwo Jima laying mooring buoys and assisting in the recovery, repair and replacement of submarine lines. Butternut departed Guam on 19 June 1950 for repairs at the Pearl Harbor Naval Shipyard. The net laying ship completed repairs and put to sea on 15 September. Steaming via Guam and Iwo Jima, she arrived in Sasebo, Japan, on 28 October. The ship conducted operations at Sasebo and Yokosuka until 7 July 1951 when she set sail for Guam to resume her former duties in the Trust Territories.

On 12 December 1951, Butternut arrived in Pearl Harbor for regular overhaul. She completed repairs almost eight months later, putting to sea for the west coast of the United States. The net laying ship reached San Francisco on 15 August 1952 but moved south to San Diego soon thereafter. Assigned to the 11th Naval District, Butternut spent a little more than five years operating in and around San Diego tending nets and buoys as well as serving as a training platform for students at the Naval Net School, Tiburon, Calif., and for members of the Naval Reserve.

In 1957, however, her mission changed significantly with the de-emphasis of nets in harbor defense in favor of more sophisticated techniques. On 14 December 1957, the Naval Ordnance Test Station (NOTS), China Lake, Calif., assumed operational control of Butternut. Administrative control remained with the Commandant, 11th Naval District. For the next seven years, the ship provided support services for the Polaris missile test and development program. In addition to serving as a monitoring platform for the scientists and engineers engaged in the program, Butternut towed hardware and support craft to and from the San Clemente Island test site, conducted surveys of the ocean bottom at the site, carried missiles to the site, and performed a myriad of other support services. In 1964, the Navy concluded its Polaris missile tests at San Clemente and closed the facility there. China Lake, however, retained operational control over Butternut for the purpose of testing the Mark 46 antisubmarine warfare (ASW) torpedo and its first modification. That duty, punctuated by repair periods, occupied her until the summer of 1969.

Found excess to the needs of the Navy late in June 1969, Butternut was decommissioned at San Diego on 18 July 1969, and her name was stricken from the Naval Vessel Register that same day. Almost immediately, however, she was reinstated on the List of Service Craft as YAG-60 for service on the Pacific Missile Range.

On 1 July 1971, YAG-60 was stricken from the Navy list. Yet even there, her service to the Navy did not end. Early in 1972, she became a salvage training hulk for Service Squadron (ServRon) 5 at Maui in the Hawaiian Islands. She was so employed until June of 1977 at which time she was destroyed as a target.

Butternut received one battle star for her World War II service.

Raymond A. Mann

21 November 2005

Published: Wed Jun 29 22:46:02 EDT 2016