Testing the JIM hard suit
The JIM suit was developed in the 1960s by Mike Humphrey and Mike Barrow of the British commercial firm Underwater Marine Equipment Limited (UMEL). Two JIM suit prototypes — named for original Tritonia diver Jim Jarrett — were built and tested in secrecy aboard HMS Reclaim in the early 1970s. These open-sea dives were carried out to 442 feet (limited by the ambient pressure suits of the support divers); after additional testing and development, Humphrey was able to take JIM to 1,000 feet in 1974.
Testing the JIM hard suit
The JIM suit was developed in the 1960s by Mike Humphrey and Mike Barrow of the British commercial firm Underwater Marine Equipment Limited (UMEL). Two JIM suit prototypes — named for original Tritonia diver Jim Jarrett — were built and tested in secrecy aboard HMS Reclaim in the early 1970s. These open-sea dives were carried out to 442 feet (limited by the ambient pressure suits of the support divers); after additional testing and development, Humphrey was able to take JIM to 1,000 feet in 1974.