How to use a sextant: Wikipedia animation

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How to use a sextant: Wikipedia animation

The original file can be found at: http://upload.wikimedia.org/wikipedia/commons/7/76/Using_sextant_swing.gif

File information:
http://en.wikipedia.org/wiki/File:Using_sextant_swing.gif

Useful text guides:
http://nauticalinformation.blogspot.com.au/2008/05/how-to-use-sextant.html
http://www.clipperlight.com/howusesextant.html

Video with more guidance:
http://www.youtube.com/watch?v=MEN6I9_VlFk