Fixed belays, on the other hand, require a belayer, belay anchor, and points of protection. The M-Belay is the most complicated of the two, and involves two separate belays. In this climbing technique, either running belays or fixed belays are used. They abandoned the tent at the foot of the ridge and climbed on without belays. To pass intermediate belays on a descent, the ascending devices may also be required. This section too is well marked in places and protected with new belays.