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Alverstoke near Portsmouth, Hampshire. At the Royal Naval Physiological Laboratory's deep trial unit, we see frogmen of the Navy's Scientific Service going into a deep dive simulator. The compression chamber recreates the natural hazards the men will encounter in a real deep sea dive. Some men watch the frogmen at a control panel topped with four closed circuit television (CCTV) screens and test communications through a microphone. The pressure is raised and lowered in the chamber by the man at the control panel. After resurfacing, the two frogmen climb through a door into the decompression chamber and lie on beds with oxygen masks to reacclimatise before going back to the 'outside world'. A doctor enters this chamber to check the men. Cuts exist - see separate record. FILM ID: A VIDEO FROM BRITISH PATHÉ. EXPLORE OUR ONLINE CHANNEL, BRITISH PATHÉ TV. IT'S FULL OF GREAT DOCUMENTARIES, FASCINATING INTERVIEWS, AND CLASSIC MOVIES. FOR LICENSING ENQUIRIES VISIT
