Examining the liquid prismatic compass

[Badger]

Examining the liquid prismatic compass

With thanks to member trademarklondon for this video ... Original Forum Thread (click here)

The video is not a demonstration of how to service a liquid prismatic compass, but is an indication of the problems an unqualified person will encounter should they try to do it themselves. It is a very fast, synthetic view of a job that actually takes several hours, and does not show the calibration, a skill that takes years to learn. The video will possibly help those who want to try, though it is not intended as a guideline for that purpose, but more it is to point out the dangers of Radium 226, and the fact that once opened a compass immediately loses its calibration, and re-calibration to within one half of one degree at all four cardinal points is an integral part of servicing, and which takes specialist optical instruments and a qualified person to carry out and be able to certify the compass. The video will also dispel various urban myths, such as using gunge to seal the glass, a special press to seal the glass to the gunge, and types of fluid to use or not to use.

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Examining the liquid prismatic compass
Video length = 19 minutes

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