Swimming between two ice holes
in the relative shallows isn't too bad as it's quite light and
you can see the bottom, but this was out in much deeper water
60m+. The sea-ice cuts out a lot of the light reaching beneath
it and in such deep water there is nothing to see as a visual
cue. The diver in this case is dependent on his depth gauge
to stay at the right level and the line "drawn" by the skidoo
on the surface that he is following to the next hole.
Eventually, the next hole comes
into sight and light shines down like a beacon.
Paul Ward -
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