Grayback-class submarine

Grayback class submarine was a class of two guided missile carrying submarines of the United States Navy.

These submarines carried the short-lived (1955-64) Regulus I and Regulus II nuclear cruise missiles that were quickly phased out by Polaris Submarine Launched Ballistic Missiles (SLBMs). They and the USS Halibut (SSGN-587) were the sole submarines designed specifically to carry Regulus.

Ships

 * USS Grayback (SSG-574), launched 1957, served as a missile submarine 1958-1964, converted to an amphibious transport submarine and served as such 1969-1984. Sunk as a target, 1986.
 * USS Growler (SSG-577), launched 1958, served 1958-1964. Museum ship at the Intrepid Sea-Air-Space Museum in New York City from 2009.