A sextant is used to determine the angle between an astronomical object and the horizon for the purposes of celestial navigation.
Mark 3 Sextant
Sometimes referred to as a "lifeboat" sextant, the Mark 3 is an inexpensive training sextant. Yet this model has taken sailors around the world. It is full-sized and has sunshades, but no optical magnification to help you find dim celestial bodies.
*Available for sale in the United States and Canada only.
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