What happens if the descent control device (DCD) is not locked off?

When the descent control device (DCD) is not locked off, the risk of an uncontrolled descent significantly increases. The DCD is designed to control the speed of descent and prevent the rope from slipping unintentionally. If the device is not locked, it can lead to a situation where the rescuer loses control over their descent, which makes it crucial for the rescuer to maintain a firm grip on the rope at all times. Letting go of the rope in such circumstances could result in a fall or injury, emphasizing the importance of never releasing the rope when the DCD is not securely locked. This highlights the need for ongoing vigilance and control during operations involving vertical rescues or descents. Maintaining hold of the rope is a fundamental safety protocol in such scenarios.