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Originally Posted by kriller2
a submarine can be seen very deep in the water when looking at it from above, especialy in the pacific if the water is calm you should be able to see a submerged submarine from f.ex. 30 - 60 meter.
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Hm
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Originally Posted by DeepIron
Guys, 60M would be exceptional visibility with an almost completely calm surface, no clouds and fairly deep water as in open ocean. Even a slight wind like a Force 1 (causes small ripples) can reduce visibility by up to 40% from the surface...
I've been a scuba diver for 20+ years and only experienced visibility approaching 60M only a few times from the surface on exceptionally calm days with little plankton bloom. Visibility is even worse as you get closer to the coastal areas due to increased turbidity from along shore currents and sediment run off from land masses.
Don't get me wrong, I'd love to see the visibility model closer to realistic but again, I think you estimate is a little optimistic.
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I totally agree with DeepIron
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Originally Posted by kriller2
Sub from above water high and looking down, the sub is at 120 ft on this picture:
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120ft are 40 Meters?? I think this is too much.
I can only imagine such views in very clear (mountain) lakes. I dived in the philippines this summer and we did not have any visibility like this. Maybe with perfect circumstances you see a silhouette.
€: Am I right that horizontal view is nearly the same as vertical view in real life? Ok, 40m visibility in the water IS possible, but rare, so it should be the ultimate limit (looking from above).