Fig. 2: While cutting a hole into the ice on a lake one has to secure the worker with a rope. Just in case he slips and falls into the hole or the ice breaks. DiveZone ice diving event, Lake Klöntal. — EXIF: Nikon D3; Δt=1/320 s; f=70 mm; f/9.0; ISO 200; 2014-03-01 10:50:54
