Fig. 4: The diving equipment is lying on a blanket on the ice. One has to take care that the regulaters do not get in contact with snow or ice. The regulator may freeze. DiveZone ice diving event, Lake Klöntal. — EXIF: Nikon D3; Δt=1/400 s; f=28 mm; f/10.0; ISO 200; 2014-03-01 11:12:06
