What does descent control in repelling mainly rely on?

In repelling, descent control primarily relies on friction, which plays a crucial role in managing the speed and safety of the descent. The ability to control the rate at which a person descends is achieved through the interaction between the rope and the friction device used, such as a carabiner or a rappel device.

When a rope runs through these devices, friction is generated as the rope is pulled. The amount of friction can be adjusted by changing the angle at which the rope runs through the device or by increasing the number of turns around the device. This control mechanism allows the individual to regulate their speed, making it possible to descend steadily and safely.

Other factors, such as the grip from the harness and the weight of the load, have their roles in overall safety and descent dynamics, but they do not directly influence the primary mechanism of descent control. Similarly, while the speed of descent can be influenced by friction, it is not a standalone factor in determining how descent is controlled; rather, it is the friction that acts upon the rope that primarily dictates this aspect.