In the September–October phase of the tour, Shark visited Athens, Greece (Piraeus) and hosted the entire Greek Royal family aboard for a cruise both above and underwater.

Shark participated in SUBFALLEX in the North Atlantic from 7 August to 24 October, with a week spent in Faslane, Scotland.

One month later, she suffered damage to the forward oxygen system which necessitated additional repairs at Charleston, South Carolina.

Shark departed Norfolk on 16 May for Halifax, Nova Scotia, which was the first visit of a nuclear ship to a Canadian port.

The submarine operated with Royal Canadian Navy ASW units before returning to her home port.

[1] On 11 June 1967, Shark prepared for her first refueling period at the Norfolk Naval Shipyard and did not put to sea again until March 1968.

The remainder of the year and 1972 was spent in refresher training and undergoing various trials along the East Coast, with the exception of a deployment to the Sixth Fleet from 31 May to 19 November 1972.

She entered the Nuclear Powered Ship and Submarine Recycling Program in Bremerton, Washington, on 1 October 1995 and on 28 June 1996 ceased to exist.