Paint on rocks and GPS tracks were used to mark the areas that had been searched.
In some places, there were remnants of old campfires, but experts determined that they were at least several months old and unrelated to the missing person.
Use of technology, quadcopters flew at an altitude of up to 150 m, photographing areas that were difficult to reach on foot.
The video was then reviewed at headquarters. In 3 days, they obtained more than 14 hours of footage.
No traces of people or equipment were found. A helicopter made two flights, but the thick shadows of the canyons made the search from above ineffective.Browse Reference
Reaction of volunteers, local residents familiar with the terrain took part. They organized themselves into small groups of four to five people and received sectors and radios from headquarters.
According to one of the volunteers, the area was too large and any traces disappeared within a few hours due to the wind.
