What are the major assemblies of the MK20?

The major assemblies of the MK20 diving system include essential components designed to ensure the safety and effectiveness of divers during underwater operations. Communication assembly, harness assembly, umbilical to mask hose assembly, and full face mask are all critical parts that work together to provide a robust diving experience.

The communication assembly is vital for enabling communication between the diver and the surface team, facilitating real-time coordination and safety checks. The harness assembly secures the diver and allows for the attachment of various components, ensuring that everything stays in place throughout the dive. The umbilical to mask hose assembly connects the diver's mask to the breathing gas supply and communication systems, providing a reliable source of air and allowing voice transmission.

The full face mask provides not only a clear field of vision but also protects the diver's face while providing an air-tight seal to maximize safety underwater. These components are specifically designed for use with the MK20 system, making option B the most accurate representation of the major assemblies within that system.