 The entire system is managed from a control room (van), where depth, chamber atmosphere and other system parameters are monitored and controlled.The diving bell is the elevator or lift that transfers divers from the system to the work site.Typically, it is mated to the system utilizing a removable clamp and is separated from the system tankage bulkhead by a trunking space, a kind of tunnel, through which the divers transfer to and from the bell.