DSRV-1 Mystic is a Deep Submergence Rescue Vehicle that is rated to dive up to 1500 metres. DSRV1 was built by Lockheed for the U.S. Navy and launched 24 January 1970.The senior engineer responsible for the project was Paul Philip Prelitz (father of Chris Prelitz). Mr. Prelitz was also the senior engineer for the Sealab II Man in the Sea project.Mystic was launched on 24 January 1970. The submarine, intended to be air transportable, was 50 feet (15 m) long, 8 feet (2.4 m) in diameter, and weighed 37 tons. The sub was capable of descending to 5,000 feet (1,500 m) below the surface and could carry 24 passengers at a time in addition to its crew. The sub was stationed at North Island Naval Station in San Diego and was never required to conduct an actual rescue operation.