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how far away can you see to the horizon over the sea?

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Tomatoesoup | 17:01 Wed 25th Apr 2007 | Science
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how far can you see to the horizon over the sea?
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The horizon will be further away as your eyeline is raised above the level of the sea surface. There is a website that will do the calculations for you here:
http://www.boatsafe.com/tools/horizon.htm
When I was much much younger, I was always told that on a perfectally clear day the horizon was about 25miles away.

However, I was also told that if I sailed my inflatable dinghy to go and find out what was on the horizon, I'd fall off the edge and into space.....!
At sea level 7 miles.
Average height person stood on the beach, toes in the water, about 2.75 miles
Literally at sea-level, zero miles surely?
I read years ago that there is an equasion for that answer which is the square root of whatever height you are at the waters edge times 1.14 miles.e.g. if you are 6 feet tall standing on a 3 foot hillock then you would be able to see about 3.42 miles away.( the square root of 6 plus 3 =3 times 1.14 miles.
Depends on eye level. But for me with eye level at approx 5 ft and standing at sea level it's approximately 3 miles
If your eyes are at sea level, and you are looking tangentially, then you will see no sea.

If you are elevated, looking down a bit, then you'll probably see as far as your eyes can... I believe it to be about 28 miles in a healthy adult with good eyesight.

It's all about the angle of attack!
If your eyes are at sea level, and you are looking tangentially, then you will see no sea.

If you are elevated, looking down a bit, then you'll probably see as far as your eyes can... I believe it to be about 28 miles in a healthy adult with good eyesight.

It's all about the angle of attack!

And the weather of course..... not far at all on a foggy day!
Think about the crows nest on a pirate ship.... it's up high for a reason!

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