JIM 18 stands alone, but its keepers are hoping that it might be joined by its “soulmate”. The Diving Museum at Gosport has issued a request to divers who might have some idea of the whereabouts of JIM 19 to get in touch, so that it can put a matching pair of the atmospheric diving suits on display.
The two JIM suits have a bond – together they once undertook a range of assignments for the Ministry of Defence, says the museum. JIM 19 was in fact the final JIM suit to be built, in 1981.
Invented in the UK in the late 1960s for use by commercial divers, JIM suits were designed to maintain an interior pressure of 1 bar whatever the external pressure, allowing deep diving with no risk of decompression illness or nitrogen narcosis, and no need to decompress on ascent.
The makers, DHB Construction, named the suit after Jim Jarrett, chief test diver of the earlier Tritonia suit that inspired the invention. Oceanographer Sylvia Earle set a human depth record of 381m using a JIM suit in 1979, and the design became famous when another JIM appeared in the James Bond film For Your Eyes Only two years later.