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What Is Sextant

Introducing of Traditional and Current Sextant

What is Sextant

Sextant, It is an instrument for measuring the altitude angle between the horizon and a celestial body such as the Sun, the Moon, or a Star, used in celestial navigation to determine the ships latitude and longitude during voyage.

Early marine sextants were hand held and had a fixed telescope leveled on the horizon. A radial arm is moved against an arc scaled in degrees. Adjust the radial arm until a known star's image reflects from the index mirror and then off the horizon mirror until down the telescope until it lines up with the horizon. The radial arm's position on the scale gives the star's elevation.

In modern sextants, which use arcs of greater or lesser size than the original type, the light ray from the celestial body is reflected in two mirrors (in series), one of which is adjustable and the other of which is half-silvered. By rotating one mirror and its attached index bar, the image of the body is brought down to the horizon. The rotation measures the altitude on the limb.

Sextant is a device that can measure the angular distance between two mirrors (index mirror and horizontal mirror) using the double reflection principle by observing the elevation of a celestial body based on the horizon or horizon. The word sextant is derived from the Latin word "Sextans," meaning 1/6 because the arc of this apparatus is 60 degrees equal to 1/6 of the circumference. Such navigational equipment can use the current time and altitude of the celestial body to obtain the position of the celestial body and to obtain the my latitude. Of course, I need a number of navigation tools and books to get my location using this equipment, and I have to go through a series of processing procedures.