What are the primary components of the MK-20 system?

The primary components of the MK-20 system include the air supply, umbilical, diver's helmet, and communication system. Each of these components plays a crucial role in the functionality and safety of the diving operation.

The air supply refers to the source of breathable air provided to the diver while submerged, which is vital for sustaining life underwater. The umbilical is the crucial connection that supplies air and may also carry communication lines to and from the diver, ensuring that they have a continuous supply without being restricted by the length of the dive. The diver's helmet is designed to protect the diver and provide clear visibility while maintaining an airtight environment that delivers the air supply. Lastly, the communication system allows for constant contact with the surface team, which is essential for safety and operational coordination during dives.

In contrast, other options include components that are not central to the MK-20 diving system. Some of those elements, like fins or a weight belt, are related to diving practices but do not form part of the MK-20’s structure.