Which class of harness is a seat harness meant for situations where another person's body weight may be added?

A seat harness is specifically designed for scenarios in which it may be necessary to support the weight of both the user and any additional load, such as another person's body weight. This type of harness provides the requisite support and stability in rescue situations, allowing for safe lowering and extraction techniques.

Class 2 harnesses typically offer more versatility in their design, enabling use in various applications, including rescue and climbing. They afford the ability to maintain a seated position while still facilitating movement and secure attachment to a lifeline or other support system.

In comparison, other harness classes may not be intended for complex support scenarios involving added loads, which can place the user at risk if not properly equipped. Therefore, the characteristics of a Class 2 harness make it most suitable for situations where additional weight from another person is involved.