In the tundra light dim, diffused. Distant objects appear close and, conversely, the small blade of grass tussocks — a relatively large and distant.
Orientation in the tundra is very difficult because of the lack of roads. In her snowy expanse not meet even the beaten path. But left in the tundra trail is very long.
Often, the only reference in the tundra, which can sometimes help in choosing the right direction are houris — artificial ridge of stones piled on the shore as a distinguishing mark.