Visibility is also affected, as we all know by weather conditions. Admittedly these change from hour to hour, day by day but many locations have persistent weather conditions or ones that happen more often than not. So depending on the prevailing micro-climate might be worth thinking about.
I also feel that distance at sea is in part the relatively high level of light compared to land and also the low levels of dust in the atmosphere.
I was once shown some photos of Antarctica taken by the Wasp pilot of HMS Endurance. The clarity of the photos were excellent and lots of clearly visible mountains with glaciers with lots of detail. In the photographs the detail of the mountains made them look as if they were about four to five miles away, but in fact they were well over a hundred miles away!! The reason for this amazing visibility is that there is very little dust in the antarctic atmosphere and so nothing for water/ice dropltets to hang onto and so no haze.
Alan Radley <[log in to unmask]> wrote:
Are we talking ¡§How far can you see¡¨ or How far away an object has to be,
and still be recognizable ? You can see Jupiter quite clearly in the
evening sky, but if you didn¡¦t know what it was, you would think it was just
another bright star, and that is relatively close to us.
Parameters need to be set, to give an accurate answer
I believe at sea, you can see about 20miles to the horizon. I think this is
one of those subject which could start to get rather ¡§heavy¡¨. º
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