Image:Using the sextant edit1.gif
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[edit] Explanation of frames
1 - Point the sextant to the horizon in the direction of the Sun. The horizon is visible at left, through the glass, and also at right, reflected by the two mirrors. The index arm is at the zero position.
2 - Press the clamp to release the index bar.
3 - Rotate the bar to bring the reflected image of the Sun to the horizon.
4 - The lower limb of the Sun is now touching the horizon. Release the clamp. Swing the sextant and adjust its position with the micrometer in order to make it exactly tangent to the horizon.
5 - Done. The altitude is 40º 17.3'.
[edit] Summary
| Description |
using the sextant to measure the altitude of the Sun above the horizon |
|---|---|
| Source |
own work |
| Date |
October 2006 |
| Author | |
| Permission |
as below |
[edit] Licensing
|
