Karmadon canyon
Two profiles.

In the initial part of profile 1 a strong signal from the object (depth 2m, size 1-2m) is observed. Repeated re-reflections of signal are observed which are characteristic either for the objects from the metals or for the voids. Large stone also can give such signal.

Profile 2 is obtained from the area located on 7m above the area where profile 1 is obtained. At depth 64.5m of profile 1 a signal is noted, probably, from the boundary "ice - earth" (marked by dark-blue pointer). On profile 2 at depth 70m intensive signal is noted, supposedly from the stop wall next to the tunnel. Consequently, tunnel is located approximately at the same depth.