How To Calculate Compass Error by Azimuth of a Star

Friday, May 13th, 2016 at 08:00 | by Alistair Baillie

How To Calculate Compass Error by Azimuth of a Star! A short video where I explain how to calculate a ships Gyro or Magnetic compass error from a bearing of a Star in this case Arcturus, by calculating the direction (or azimuth) of the Star.

Ask any questions in the comments – I’ll do my best to answer them.

Pro Forma:

NOTE: This video makes use of selected pages from the British Admiralty Nautical Almanac (Admiralty Publication NP314). The example uses the 2016 version of the publication so if you’re doing the calculation for a different year the numbers won’t be the same.

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