Noon
The ship lunchtime is a term from seafaring. It is the point in time of the observed highest point of the sun and is found without time measurement.
It is easy to determine with a sextant as the point in time at which the observed angle between the chin and the sun is greatest. The sun is then exactly in the south or in the north, depending on the position of the observer.
The latitude of the observer, the midday latitude , is calculated from the angle between the sun and the horizon .
With a precise determination of the ship's noon and an accurate clock, the current longitude , the noon longitude , can be determined, see astronomical navigation .
From noon length and noon width , the results noon position .
The distance covered between two consecutive lunchtimes on the ship is called the Etmal .