Difficult experience that opened on the knowledge of the oceans in general and especially pelagic world. Ocean Observing an operation should be alert to the general public.
Crossing the Indian Ocean in 1998 in an underwater habitat drifting at -7m depth.
Laboratories Daniel Jouvance
Check the physiological capacity of humans to withstand life in shallow blood saturation accompanied by successive lifts. Observe the stress mechanisms of such a test.
Observe the pelagic life by promoting its concentration around a drifting object.
Getting samples of phytoplankton and zooplankton to develop a qualitative inventory of the region.
Steel float overhead (design Rougerie)
Width 4.5 m
Weight 12 tonnes
Regeneration and compression of the air 2 electric compressor 40l/mn, 1 thermical (diesel) compressor 26m3 / h, regeneration system with lithium hydroxide.
Energy: 4 wind turbines, 12 solar panels of 85 W, batteries 1000 A / h at 12 V.
Underwater Habitat = steel (design Rougerie)
Volume 16 m3
Weight 6.5 tonnes
Amenities: 1 office, 1 toilet, 1 bunk, 2 microwave
Means of Communication: Inmarsat satellite links B, C, HSB radio and radios VHF
Ballast: 12.5 tons.
Simulation in a hyperbaric chamber in the center of Ravenna, Italy
Test in situ in the port of Le Havre.
Weather anormally bad for the season (El Nino year)
Ruptures of the suspension of the underwater habitat (resistance 200 tons), and sinking of the underwater habitat after 13 days of drift.
Results, Advances in knowledge:
Observations made in marine biology at 65%
Drawing planktonic made to 60%
Experience leading (following the sinking of Ocean Observing) the design of new underwater habitats.