The Sextant - Noon Sight
Автор: Bob the Science Guy
Загружено: 2021-10-04
Просмотров: 2070
Описание:
In this episode Bob takes a noon sight, without a horizon, using both the Link A12 Bubble Sextant and the Davis M-25 Marine Sextant (using an artificial horizon). Despite not having access to the horizon, he was able to locate his position within just over 7 nautical miles.
This is a sight done start to finish with all navigational calculations (well most of them, we could have done a bit better, but this is my house).
Note, in order to provide an accurate location, the sextant requires two conditions to be true...
1/ light from the sun and stars must arrive at earth in parallel
2/ the surface of the earth must be curved (a sphere).
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