Stock Photo - Jul. 07, 1965 - Submarine Escape Trials from Record Depths Pictures from the Mediterranean during the Submarine Escape Trials from depths as great as 500 ft. by a Royal Navy Volunteer escape team from H.M.S. Dolphin, the Gespert Submarine base. Using new techniques, the escapers, dressed in suits incorporating a cotton fabric hood with plastic face piece, breathed trapped air during the ascent to the surface after being released from a one man cylinder, flooded from the sea inside the submarine Orpheus. Important result of this method is that pressuration is achieved rapidly and the escaper is subjected to it for an absolute minimum period before leaving the submarine. Inside the cylinder he breathes air supplied automatically at the correct rate before making his escape. The trials took place off Malta. Photo Shows: Ready for the ascent - an escaper (C.P.O. Ivor Jones, of Fareham, Hants), enters the escape chamber in the submarine Orpheus. (Credit Image: © Keystone Press Agency/Keystone USA via ZUMAPRESS.com)