Just looking at the design, and the missions working on cables, I was wondering if any of the spheres were for deep divers - where the record depth is over 2000ft.
https://web.archive.org/web/20081005...20anglais.html
https://en.wikipedia.org/wiki/Deep_diving
”Deep diving can mean something else in the commercial diving field. For instance early experiments carried out by Comex S.A. (
Compagnie maritime d'expertises) using
hydrox and
trimix attained far greater depths than any recreational technical diving. One example being the Comex Janus IV open-sea dive to 501 metres (1,644 ft) in 1977.
[2]
[3] The open-sea diving depth record was achieved in 1988 by a team of Comex divers who performed pipeline connection exercises at a depth of 534 metres (1,752 ft) in the Mediterranean Sea as part of the Hydra 8 programme.
[4] These divers needed to breathe special gas mixtures because they were exposed to very high ambient pressure (more than 50 times atmospheric pressure).“.....