Apra Harbor
On 24 February "Proteus" arrived at Rota, Spain, to establish the second overseas replenishment site for Fleet Ballistic Missile submarines, returning to Holy Loch 12 April. On 29 June she put in at Charleston and on 16 October was en route to Guam. Arriving Apra Harbor 29 November, she established the third overseas replenishment site for the Fleet Ballistic Missile submarines. She continued to operate at Apra Harbor and in the Pacific for the next seven years, taking a five-month time off for self-overhaul in 1968 - relieved by .