The first flight transports personnel responsible for receiving the goods at each hut, then returns to the glacier to attach the first supply load. A sling line is carefully calculated and rigged to lower supply bags to each hut, where the managers slit them open and unpack their contents of equipment and provisions. Everything is calculated with precision, so the pilot must be intimately familiar with the flight locations and mission. Confidence between the pilot and the flight assistant is essential; at such high altitude, no error is allowed. The places are hostile, the weather is capricious, and mountain fog wafts about.
