SSM-N-9 Regulus II
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The SSM-N-9 Regulus II was a guided supersonic cruise missile armed with a nuclear warhead, intended for launching from surface ships and submarines of the U.S. Navy.
USS Grayback (SSG-574) preparing to launch a Regulus II missile
Regulus II test launch in 1957. The swept-forward Ferri-style intake can be seen.
The hangar for the supersonic Regulus II cruise missile being installed aboard USS King County (AG-157), a Landing Ship, Tank (LST) converted to an experimental guided-missile testing ship, on 5 April 1957. USS YD-33 is doing the lifting.
USS Halibut (SSGN-587)
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USS Halibut, a unique nuclear-powered guided missile submarine-turned-special operations platform, later redesignated as an attack submarine SSN-587, was the second ship of the United States Navy to b
SSM-N-9 Regulus II
…from the deck of an SSG (guided missile submarine), and the missile most likely would have been deployed on the two Grayback-class submarines and the USS Halibut (SSGN-587), which were designed for the missile, and possibly eventually on four heavy cruisers that had deployed with Regulus I and 23 other submarines potentially…
USS Halibut
Halibut firing a Regulus missile next to the aircraft carrier Lexington, 25 March 1960
Halibut with Diamond Head in the background in late 1965. Note her topside thruster and lack of DSRV
View of Halibut departing San Francisco, likely in the mid-1970s.