What's the Viz? - It's how
far you can see underwater. How many times did I hear that?
In the winter in Antarctica, sea-ice forms and kills the ocean
swell, this stops water movement stirring up any sediment in
the water column which then settles out. After a few weeks,
the visibility rises to a distance that is pretty much unknown
in any other circumstances.
I recall seeing an horizon under
water. The best "Viz" was at the end of winter when the sea
hadn't been stirred up, but there wasn't a light-stopping ice
layer, so you could see clearly through the water and there
was plenty of light to see with. What's the Viz? 30m - 50m?,
the optical effects of the water then stared to take over -
but effectively it was as far as the eye could see.
Oh yes - sitting on an ice berg
at about 15m in this shot and seeing how far I could see.
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