NavList:

Greg
I occasionally calibrate one of my own sextants when I can find nothing less boring to do ( http://sextantbook.com/2011/02/ ), but I don't offer a service because I am in New Zealand and the rest of the world is a long way away. It costs over US$80 each way to send a sextant here from the USA.

If you have checked your mirrors for perpendicularity, side and index errors, and checked that the axis of the scope is parallel to the frame (see your new book for details), and there is no visible damage to the frame, especially the rack, it is very unlikely that your instrument will have errors of practical significance.

As to the resolution, I suspect an extra zero has crept in after the decimal point in translation and it should read "0.2", i.e. the drum vernier reads to 0.2 minutes. In practice, except for lunars, this is "empty precision" as errors of refraction etc. swamp instrument errors.

Bill Morris
Pukenui
New Zealand
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