On 12/05/10 14:14, scarlett99 wrote:

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I am on a survey boat need very accurate headings.



Question:

The concept of a gyrocompass on a ship was new to me. I read up a bit
and I think the difference to a whisky compass is that variation and
deviation have no influence.

What kind of reading accuracy can one expect when it gets "a bit choppy"?

5 Degrees with dampening, maybe?

Thanks
Werner Dahn