Diveline Twisted Umbilical - 3 part Diver umbilical with pneumo & gas hose and cable A diver umbilical with pneumo and gas hose and cable is a bundle of hoses and cables that connects a commercial diver's helmet to the surface control panel. The umbilical typically consists of three main parts: Pneumo hose: This hose allows the surface team to provide the diver with air pressure information, such as depth, time, and decompression stops. Gas hose: This hose supplies the diver with breathing gas, usually a mixture of air and helium or oxygen. Cable: This electrical cable transmits audio and video signals from the diver's microphone and camera to the surface.