The Grayback-class submarine was a class of two guided missile-carrying submarines of the United States Navy. They carried the Regulus I and Regulus II nuclear cruise missiles, deployed 1957–64, that were rapidly phased out by Polaris Submarine Launched Ballistic Missiles (SLBMs). They and USS Halibut were the sole submarines designed specifically to carry Regulus missiles, and the only submarines capable of carrying Regulus II. However, USS Tunny and USS Barbero were modified earlier to carry two Regulus I missiles per boat.

The Intrepid Museum is an American military and maritime history museum in New York City. It is located at Pier 86 at 46th Street, along the Hudson River, in the Hell's Kitchen neighborhood on the West Side of Manhattan. The museum is mostly composed of exhibits, aircraft, and spacecraft aboard the museum ship USS Intrepid, a World War II–era aircraft carrier, as well as a cruise missile submarine named USS Growler and exhibits on Pier 86. The Intrepid Museum Foundation, a 501(c)(3) organization established in 1979, operates the museum.