Get Sextant Users Guidev5 - Beth And Evans Home Page

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 ( mirror A in the diagram) is half-silvered, which allows some light to pass through. In navigating, you look at the horizon through this mirror.

0:58 12:28 Can You Really FIND Your COORDINATES With a SEXTANT? YouTube Start of suggested clip End of suggested clip It by 12 o'clock so 12 noon. And that's going to find your time difference from utc. So if we takeMoreIt by 12 o'clock so 12 noon. And that's going to find your time difference from utc. So if we take the 15 37. And we subtract.

Tape the straight edge of the protractor to the ruler, about half an inch from one end. On a clear night, hold the ruler up to your eye and sight Polaris (the star at the end of the Little Dipper's “handle”) down its length. Measure the angle at which the string hangs, and subtract this number from 90.

Reading the sextant is very simple: Degrees are read directly from the graduated arc opposite the index mark on the index arm. Minutes are read from the micrometer drum opposite the vernier index mark. Seconds are read from the vernier where one of the vernier graduations lines up with one of the. micrometer graduations.

Clamp the index bar at 0 degree 0.0'. Hold the sextant vertically and look at the heavenly body. Turn the micrometer one way and then the other, while looking at the body. The reflected image of the body will move above and below the direct image and should pass exactly over it.

1:35 7:15 Sextant Tutorial: The Principle of the Sextant - YouTube YouTube Start of suggested clip End of suggested clip And the clamp is used to release that scale. So the index arm can move freely. You'll need toMoreAnd the clamp is used to release that scale. So the index arm can move freely. You'll need to release the scale using the clamp when you're wanting to take a site.