Testing More Equipment
On 21 November 1960, the ship entered the Portsmouth Naval Shipyard for a major overhaul and conversion in which she received: a new, experimental, "X"-shaped tail for increased control; 10 dive brakes around her hull, a new bow which included modified forward ballast tanks, new sonar systems, and a large auxiliary rudder in the after part of her sail. following the completion of this work in August 1961, she operated along the east coast learning the effect of her new configuration and equipment upon her capabilities and performance.
In 1962, she received a newly developed DIMUS sonar system and, on 7 December 1962, work began on her fourth major conversion which included the installation of concentric contra-rotating propellers, a high-capacity silver-zinc battery and a larger main motor. New radio equipment, BQS and BQR sonars, an emergency recovery system, and a new main ballast tank blow system were also added. After the work was completed in March 1965, Albacore prepared for deployment to Florida waters to study the results of her changes. She returned to Portsmouth on 8 October 1962 and continued to evaluate her capabilities under the new configuration. On 1 August, she reentered the Portsmouth Naval Shipyard to replace the silver-zinc battery and to shorten the distance between the contra-rotating propellers—work which lasted into August 1967.
Standardization and machinery tests in the Gulf of Maine during September were followed by evaluation of towed sonar arrays off Port Everglades, Florida, in October and November. Then came acoustics trials in the Tongue of the Ocean, a deep channel in the Central Bahama Islands.
On 1 January 1968, the submarine returned to Portsmouth for a modification of her propulsion system which kept her in the navy yard until 19 April. Then, following a month of trials in the Gulf of Maine, she headed south for evaluation of her new MONOB I and AUTEC systems and of Fly-Around-Body (FAB), Phase I, equipment on Tongue of the Ocean. She returned to Portsmouth on 24 August 1968 for AUTEC deinstrumentation and installation of FAB Phase II equipment. Then, following evaluation of this new gear in the Gulf of Maine, the Albacore returned to Portsmouth on 30 September and went into reduced operating status pending the results of further studies on the feasibility of using her thereafter for further research.
The ship remained for the most part inactive until 2 February 1970 when she began an overhaul in drydock and modifications to prepare her for Project Surpass, a research and development project sponsored by the Naval Ship Research and Development Center at Carderock, Maryland. The ship left drydock on 16 April 1971, commenced sea trials on 22 July 1971, and completed them on August 1971. Early in October, she operated off Provincetown, Massachusetts, to calibrate her sonar and radar equipment.
Read more about this topic: USS Albacore (AGSS-569)
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