What does the term "relief" refer to in an MK20 operation?

In the context of an MK20 operation, "relief" specifically refers to the act of providing assistance, particularly in a rescue scenario. This encompasses various forms of support, such as delivering supplies, aiding in the recovery of personnel, or ensuring safe conditions for those involved in an undersea rescue. The primary goal of a relief operation is to enhance the safety and well-being of individuals affected by an underwater incident, making it a crucial aspect of rescue missions.

While the other options involve important components of operational procedures—like measuring pressure levels, deploying equipment, or disassembling components—they do not capture the essence of providing direct assistance to those in need, which is what relief signifies in this context.