Technical research ships were used by the United States Navy during the 1960s to gather intelligence by monitoring, recording and analyzing wireless electronic communications of nations in various parts of the world. At the time these ships were active, the mission of the ships was covert and discussion of the true mission was prohibited. The mission of the ships was publicly given as conducting research into atmospheric and communications phenomena. However, the true mission was more or less an open secret and the ships were commonly referred to as "spy ships".
USS Midas (ARB-5) was planned as a United States Navy LST-491-class tank landing ship, but was redesignated as one of twelve Aristaeus-class battle damage repair ships built for the United States Navy during World War II. Named for Midas, she was the only US Naval vessel to bear the name.
Nashira (AK-85) was planned as a civilian cargo ship for the United States Maritime Commission, transferred to the Navy for construction then transferred to the U.S. Army and renamed two days after launching. The ship was never commissioned, thus never bore the USS designation, and had no significant naval service. The ship was converted to the U.S. Army Engineer Port Repair ship Richard R. Arnold and served in the Pacific during 1945.
The second USS Chimo (ACM-1) was the lead ship of her class of minelayers in the United States Navy during World War II.
USS Bastion (ACM-6) was a Chimo-class minelayer in the United States Navy during World War II.
Sagitta (AK-87) was never commissioned and thus never bore the USS designation.
Tucana (AK-88) was never commissioned and thus never bore the USS designation. She was transferred upon launching on 13 September 1944 to the U.S. Army as the U.S. Army Engineer Port Repair ship Arthur C. Ely.
Vela (AK-89) was never commissioned and thus never bore the USS designation. The ship was transferred to the Army to become the Engineer Port Repair Ship Joe C. Specker shortly after launching. She was one of two such repair ships transferred to Navy in 1952 and served as the civilian crewed, unarmed USNS Vela (T-AK-89).
BRP Rajah Lakandula (PF-4) was a frigate of the Philippine Navy, and was its only ex-USN Edsall-class destroyer escort. She was also the flagship of the Philippine Navy from 1981 to 1988.
USS Deal (AG-131/AKL-2) was constructed for the U.S. Army as U.S. Army FS-263 shortly before the end of World War II and later acquired by the U.S. Navy in 1947. She was configured as a transport and cargo ship, classed by the Navy as a Camano-class cargo ship and operated with the U.S. Pacific Fleet from post-World War II and on through the end of the Korean War.
USS Ryer (AG-138/AKL-9) was a Camano-class cargo ship constructed for the U.S. Army as the Freight and Supply Ship USA FS-361 shortly before the end of World War II. On delivery the ship was U.S. Coast Guard crewed and assigned to serve the Southwest Pacific area during the war. The ship was acquired by the U.S. Navy in 1947, configured as a transport and cargo ship, named and was Commissioned, Miscellaneous Auxiliary, USS Ryer (AG-138), 8 June 1947 and reclassified Light Cargo Ship, (AKL-9), 31 March 1949.
USS Hewell (AG-145/AKL-14) was a Camano-class cargo ship constructed for the U.S. Army as FS-391 shortly before the end of World War II. FS-391 operated with a U.S. Coast Guard crew in the Southwest Pacific area. The ship was acquired by the U.S. Navy in 1948. She was configured as a transport and cargo ship and served with the U.S. Pacific Fleet – including highly decorated service during the Korean War – until decommissioned in 1955.
USS Coco (SP-110) was an armed motorboat that served in the United States Navy as a Section patrol vessel from 1917 to 1919.
USS Mark (AG-143), was built as the Aircraft Repair variant, Design 427, of the Army FS types as FS-214 for use by the United States Army. She was built at Higgins Industries, New Orleans, Louisiana, completed in December 1944. The ship was designed with the well deck covered to provide shop space for the work of repairing aircraft by an embarked Aircraft Maintenance Unit (Floating).
USNS New Bedford (FS-289/AKL-17) was a Navy owned Military Sea Transportation Service civilian crewed Camano-class cargo ship originally constructed for the U.S. Army as the coastal freighter FS-289 shortly before the end of World War II.
The USS Banner was originally U.S. Army FS-345 serving in the Southwest Pacific during the closing days of World War II as one of the Army's United States Coast Guard crewed ships. In 1950 the ship was acquired by the Navy and converted into a light auxiliary cargo (AKL). In 1967 the ship was converted for electronic intelligence and reclassified as Auxiliary General Environmental Research (AGER).
The Banner class was a class of three environmental research ships converted from Camano-class cargo ships by the United States Navy during the 1960s. The class comprised three ships: Banner, Pueblo, and Palm Beach. The ships were originally United States Army vessels, which had been built in 1944. Although officially classified as environmental research ships, they were actually used for signals intelligence gathering, as part of the AGER program.
Alhena (AKL-38) was a Design 381 built for the United States Army as FS-257. The Army vessel was U.S. Coast Guard crewed, serving in the Southwest Pacific during World War II.
Operation Ivory Soap was a classified United States military project to provide forward theatre support for aircraft repair and maintenance during World War II in the Pacific Theatre of Operations. Six Liberty ships were converted into floating shops to repair aircraft. They were designated Aircraft Repair Units (Floating). The Liberty ships were retrofitted to repair B-29 bombers. Eighteen smaller 187 feet (57 m) long auxiliary vessels were designated as Aircraft Maintenance Units. The smaller vessels were intended to repair fighter aircraft like the P-51 Mustang, Lockheed P-38, Sikorsky R-4 helicopters, and amphibious vehicles.
United States