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There's no way around it: Celestial navigation using a sextant is a complex and involved process that involves a fair amount of calculating, correcting, referring to tables, knowledge of the heavens ...

A new Digital Sextant has been engineered to provide back-up navigation in the event of failure or malicious adjustment of the GPS system, says manufacturer ScanjetPSM. The Digital Sextant provides a ...

Nowadays, fixing longitude and latitude at sea can be done with the click of a button through satellite navigation. But that removes the human factor in pinpointing one's place on earth -- something ...