quarta-feira, 20 de abril de 2016

The observer is at SEA level - My favorites quotes from the famous Bowditch


Leia uma explicação para esta série de 30 posts clicando aqui.





"Distance by vertical angle between the waterline
and the top of an object is computed by solving the
right triangle formed between the observer, the top of
the object, and the waterline of the object by simple
trigonometry. This assumes that the observer is at SEA
level, the Earth is flat between observer and object,
there is no refraction, and the object and its waterline
form a right angle. For most cases of practical significance,
these assumptions produce no large errors."

CHAPTER 22 CALCULATIONS AND CONVERSIONS

BOWDITCH

THE AMERICAN PRACTICAL NAVIGATOR





Leia uma explicação para esta série de 30 posts clicando aqui.

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