During her assignments to the continental
United States,
Shasta participated in several special projects. She acted as a target ship for nuclear submarines, tested instruments on a dummy
Polaris missile attached to her keel, and took part in
NATO exercises. In June 1959,
Shasta helped test a recently developed torpedo counter-measure known as Project "Phoenix". On 14 September 1966,
Shasta steamed out of Norfolk on a final visit to the Far East. She transited the
Panama Canal on 20 September, called briefly at Pearl Harbor, and arrived at
Subic Bay in the Philippines on 26 October. She remained in the Far East, either at Subic Bay or on
Yankee Station, until 22 April 1967. On that day, she started her return voyage to Norfolk. Arriving at Norfolk on 8 June, Shasta completed her only circumnavigation of the globe. During this voyage, she transited the
Suez Canal and stopped at
Valletta,
Malta; and
Barcelona,
Spain. ==Final deployment==