Caisson (individual sign-ups)

Caisson
Caisson is a non-shipwreck dive from 100ft to 150ft.  This can be a recreational dive within 130ft.  The history of this caisson is unknown.  In geotechnical engineering, a caisson is a watertight retaining structure used, for example, to work on the foundations of a bridge pier, for the construction of a concrete dam, or for the repair of ships. Caissons are constructed in such a way that the water can be pumped out, keeping the work environment dry.

Certifications: AOW or above, limit to recreational dives at 130ft