wet bell definition
wet bell means a stage that is equipped with a dry upper compartment; and
wet bell means a vessel linked to the surface, with the bottom open, whose hull is not submitted to a pressure difference and having, at its top, a dry compartment for the diver ; (cloche de plongée)
wet bell means a diver deployment and recovery device as a minimum fitted with a gas filled dome, a main supply umbilical from the surface (providing breathing gas and other service to a manifold inside the device), and diver excursion umbilicals terminated at the device.