Janus IV Construction Divint at 460 M (1509 FT) New World Record at 501 M (1644 FT)

New compression tables developed by Comex for the experimental diving project, JANUS IV, extend diving capabilities. Divers were at bottom pressure for about 60 hrs. Three men made excursion dives to 501 m (1644 ft). Three factors contributed to the success of the project: + new compression tables that minimize the effects of high pressure nervous syndrome (HPNS) through control of nitrogen during compression. + diver confidence in the proven reliability and quality of the equipment used. + high capability of the divers. A diving team, with Comex as operator, set the new diving depth record and at the same time effectively doubled the depth at which men can work at ambient pressure by conducting pipeline connection operations at 460 m (1509 ft).