Swiss Cho Oyu Attempt. Leader Norbert Joos, Peter Alig and Louis Deuber were defeated by dangerous snow conditions on this attempt on Cho Oyu’s southeast face. They reached 7600 meters on September 20 but were forced to retreat. They had had four bivouacs in their alpine-style attempt. On October 1, they got only to 7100 meters. Waist-deep powder snow and fierce winds meant great avalanche danger.
Michael J. Cheney, Himalayan Club, and Elizabeth Hawley