Stock Photo - Dive supervisors control room for commercial diving. Gauges and sensors give a readout of oxygen and CO2 levels, depth, gas contents, communications, life support and task monitoring. Closed bell used for training commercial saturation divers in closed bell operation. The closed bell opens at the base when working depth is reached to allow the divers to work one at a time through a moon pool, and will mate with a pressurised habitat to maintain the divers at a working pressure for up to a month at a time. These are used in deep water oil and gas operations worldwide.