Describe the function of the diver's helmet in the KM-37 system.

The diver's helmet in the KM-37 system serves several essential functions. Primarily, it provides a constant air supply to the diver, enabling them to breathe underwater safely. This air is delivered through the umbilical connection to a surface air supply, ensuring that the diver has a steady flow of oxygen while submerged.

In addition to supplying air, the helmet also offers protection for the diver. It shields the diver from various underwater hazards, including debris, cold water, and pressure changes at depth. The helmet is designed to withstand significant water pressure, which is crucial for the safety and effectiveness of deep-sea diving operations.

Moreover, the helmet is equipped with a communication system that allows the diver to maintain contact with surface personnel. This communication capability is vital for coordination, safety, and the execution of tasks while diving.

These combined functions underscore the importance of the helmet in the KM-37 system, making option B the most comprehensive and accurate description of its role.