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Dan wrote:
Nick wrote: The horizon depends on the height of your eye - the dipping distance tables in the almanac give the distance off for height. You will see objects above sea level 'over the horizon' according to their height so as the ship approaches, you will see more of it. 70 foot high ship viewed from 3 metres high. I can't be arsed to do the maths but I bet it isn't *far* off 22 miles. What would you estimate? Not quite that far. Dipping distance(nm) is 2.08 * SQRT(height in metres). 3 metres gives a horizon at 3.6 nm. The 21 metre ship has a dipping distance of 9.5 nm. So at 13.1 nm you will see the tops of the masts and at 3.6 nm you will see the hull down to waterline. |
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