SSM-N-9 Regulus II
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 (USN). == History == The limitations of the Regulus I were well known by the time it entered service in 1955, so the Navy issued a specification for a surface-launched supersonic shipborne cruise missile, equipped to carry a nuclear warhead, that had greater range, accuracy and resistance to countermeasures.