Open-water diving
Videos
Open-water diving is underwater diving in an open water environment, where the diver has unrestricted access by way of a direct vertical ascent to the breathable air of the atmosphere. Other environme
Tethered diver in blue water dive observing fauna in the water column
Marine scientist coordinates a blue water dive for 4 companions - each at the end of a rope tether and each rope kept taut by a weight and pulley system
Penetration diving
Videos
An overhead or penetration diving environment is where the diver enters a space from which there is no direct, purely vertical ascent to the safety of breathable atmosphere at the surface. Cave diving
Open-water diving
…contact with the Earth's atmosphere. Environments which by definition are not open water include overhead environments, and diving in these is called Penetration diving. This may involve entering caves or wrecks, or diving under ice or the hull of a large ship. In some contexts the lack of a decompression obligation…
A cave diver running a reel with guide line into the overhead environment
Divers at the wreck of the SS Carnatic
Plongée sous glace VJ