Which component is NOT typically part of the umbilical?

The component that is not typically part of the umbilical is indeed leather gloves. The umbilical serves as the lifeline for divers, connecting them to the surface and incorporating critical components necessary for safe diving operations.

Breathing gas hoses are essential because they supply the diver with the air needed underwater. The pneumofathometer hose is also vital, as it transmits pressure data from the underwater environment back to the surface, allowing for accurate depth measurements and monitoring. The communication cable is necessary to maintain clear communication between the diver and the surface crew during the dive.

Leather gloves, while important for protecting divers' hands and providing grip, do not form part of the umbilical itself. Instead, these are personal protective equipment worn by the diver independently of the equipment used for air supply and communication, which are all integrated into the umbilical system. This distinction highlights the specific roles different components play in ensuring diver safety and operational effectiveness.