Page:CAB Accident Report, United Airlines Flight 16.pdf/113

 120 - Absolute dependence should not be placed upon any radio range in the present state of the art of radio range transmission, particularly in the case of a range located in a mountainous area where malfunctioning is likel; to have disastrous results, However, the let-down procedure preseribed by United and approved by the Civil Aeronautics Administration indicates an ap preciation of these facts, United was not required, in addition to the saf guards provided in the let-dowa procedure, to establish its own system for monitoring the Salt Lake range, That responsibility is one which must be assumed by the Civil Aeronautics Administration as an incident to the estab lishment and operation of the range. "It also appears that many pilots, like the management of United, did nc especially distrust this range as an aid to air navigation, However, confi- dence on the part of a pilot in a radio range is no excuse for deviation fro well established radio range technique which requires the use of all avail- able facilities, Safety of operation under conditions of low ceiling and visibility when a radio range must be used depends upon all concerned perfor ing each and every duty with the greatest of care. This was not done on the morning of November 4, 1940,