Diving bells are used as underwater rescue vessels and by working divers doing underwater work andpppppppped so as to remain upright in the water and to be negatively buoyant so that it sinks even when completely full of air.
Diving bells are used as underwater rescue vessels and by working divers doing underwater work and salvage. The bell is ballasted so as to remain upright in the water and to be negatively buoyant so that it sinks even when completely full of air.