October 1935 Jarret made a successful deep dive to more than on the wreck of the off south Ireland, followed by a shallower dive to in the English Channel in 1937 after which, due to lack of interest, the Tritonia suit was retired. The development in atmospheric pressure suits stagnated in the 1940s through 1960s, as efforts were concentrated on solving the problems of deep diving by dealing with the physiological problems of ambient pressure diving instead of avoiding them by isolating the diver from the pressure. Although the advances in ambient pressure diving (in particular, with scuba gear) were significant, the limitations brought renewed interest to the development of the ADS in the late 1960s. The JIM suit The Tritonia suit spent about 30 years in an engineering company's warehouse in Glasgow, where it was discovered, with Peress' help, by two partners in the British firm Underwater Marine Equipment, Mike Humphrey and Mike Borrow, in the mid-1960s. UMEL would later classify Peress' suit as the "A.D.S Type I", a designation system that would be continued by the company for later models. In 1969, Peress was asked to become a consultant to the new company created to develop the JIM suit, named in honour of the diver Jim Jarret. The first JIM suit was completed in November 1971 and underwent trials aboard in early 1972. In 1976, the JIM suit set a record for the longest working dive below , lasting five hours and 59 minutes at a depth of . The first JIM suits were constructed from cast magnesium for its high strength-to-weight ratio and weighed approximately in air including the diver. They were in height and had a maximum operating depth of . The suit had a positive buoyancy of . Ballast was attached to the suit's front and could be jettisoned from within, allowing the operator to ascend to the surface at approximately . The suit also incorporated a communication link and a jettisonable umbilical connection. The original JIM suit had eight annular oil-supported universal joints, one in each shoulder and lower arm, and one at each hip and knee. The JIM operator received air through an oral/nasal mask that attached to a lung-powered scrubber that had a life support duration of approximately 72 hours. Operations in arctic conditions with water temperatures of −1.7 °C for over 5 hours were successfully carried out using woolen thermal protection