Principle of use
The Earth's axis of rotation remains effectively stationary throughout the year. Thus, with knowledge of the currentHistorical uses
Astrocompasses became useful only after the invention of theOperation
The operation is as follows: #Getting the local time (by means of a clock) #Setting the latitude #Setting (in theSee also
*References
*'How it Works, Part 6' '' Marshall Cavendish Limited 1974'' Navigational equipment