The Apollo program utilized a sextant, a centuries-old navigational instrument, as a backup guidance and navigation system in the Command Module, independent of the Apollo Guidance Computer (AGC) and ...

There's nothing mystical or complicated about a sextant. All it is is a device that measures the angle between two objects. The sextant makes use of two mirrors. With this sextant, one of the mirrors ...

A sextant is the antique version of a GPS. And in his basement workshop, Ridge White is one of the few people in the world still servicing and repairing the instruments. “Sarah,” a replica of an ...