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A sextant is a doubly reflecting navigation instrument that measures the angular distance between two visible objects In celestial navigation, it measures the angle between the horizon and a celestial body (the sun, moon, planets or stars), and in terrestrial navigation, it measures the angle between two charted objects (lighthouses, piers, etc.). The primary use of a sextant is to measure the angle between an astronomical object and the horizon for the purposes of celestial navigation.
Sextant | Royal Museums Greenwich
Sextant, instrument for determining the angle between the horizon and a celestial body such as the sun, the moon, or a star, used in celestial navigation to determine latitude and longitude. The sextant is a navigational instrument used to measure angles A sextant is a navigational instrument that measures the angle between two objects
It uses a pair of mirrors to overlay one object over the other
The angle between the objects is proportional to the angle between the mirrors, so you can read it directly from the arc of the sextant. Sextants, brass or aluminum comprise the frame Frames co e in various designs, most are similar to this Teeth mark the outer edge of th limb, each tooth marks one degree of altitude
The alt tude graduations lie along the link on the arc Sextant is an essential tool for celestial navigation and is also used by mariners to measure the angle between the horizon and a visible object (or two objects at sea). A sextant is a navigational instrument designed to measure the angular distance between two visible objects Its primary application is in celestial navigation, determining the altitude of celestial bodies like the sun, moon, or stars, above the observer’s horizon.
A sextant is a navigational instrument used to measure the angle between two visible objects
Although initially designed for maritime navigation, its application has extended to various outdoor activities. Sextants are ancient devices that are still used today to determine a ship's position at sea They can be used when no landmarks are visible as they measure the distance from a sun or planet Learn how sextants work for marine navigation.
Sextant is one of the oldest navigation instruments used by mariners, its called sextant because its arc is 1/6th of a circle i.e 60° but it can measure angles upto 120° using double reflection principle.
