Divers on a Lead
Fig. 29: Ice divers and dogs must be kept on a lead. Without it you might not find the way back to the hole. There's not enough air in your tank to wait for spring. DiveZone ice diving event, Lake Klöntal. Nikon D3; Δt=1/5000 s; f=70 mm; f/2.8; ISO 200; 1 March 2014 12:27:11