What that guy says is correct, the correct formula should use the tan() function. But for our purposes the result is the same. There would be no point using the correct formula, it would yield the same result.
Eg. when tha angle is 1 degree, for a 30m high ship:
- correct formula: distance = 1718.70 m
- wrong formula: distance = 1718.96 m
So the error is few centimetres.
Still I don't know why this approximate formula was used.
Maraz
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