Calculating Variation
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How to calculate variation using the information found on a Compass Rose of a chart.
Charts have the necessary information to calculate variation appropriate for their coverage area. They provide the local variation at a given date (year), and the amount and direction variation changes yearly on a Compass Rose.
Using these two pieces of information, we can calculate today's variation for use in that area on that chart.
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- Category(ies): Day Skipper Theory, Knowing where you are!
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- Creation date 29th January 2022
- Last updated 25th March 2024