Which part of the MK-20 system is responsible for balancing the diver's internal pressure during ascent and descent?

The equalization diaphragm plays a crucial role in balancing the diver's internal pressure during ascent and descent. As a diver descends underwater, the pressure surrounding them increases, which can cause discomfort or even injury if the internal pressure of the body is not equalized properly. The equalization diaphragm allows for the regulation of air pressure in spaces such as the ears and sinuses, enabling the diver to adjust and equalize their internal pressure with the external environment.

This component is essential for safe diving practices, ensuring that pressure differences do not lead to barotrauma, a condition that can occur when a diver ascends or descends without properly equalizing the pressures in their body. Managing the internal pressure effectively aids in maintaining comfort and safety throughout the dive.

Other components like the breathing gas supply, weight system, and buoyancy compensator serve important functions in the overall operation of the diving system, but they do not specifically address the need for pressure equalization within the diver's body as they change depths.