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post #28 of Old 10-05-2013
bfloyd4445
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Re: Deviation

[QUOTE=Uricanejack;1099466]In practice most small wood or GRP boats can virtually ignore deviation unless someone has mounted or left a ferrous object

If you fail to ascertain the accuracy of the handheld compass your results will be skewed. What your saying is like comparing one cars speedometer reading against another car to determine if one of the cars speedo is correct. Does no good without first making sure the instrument used to calibrate with is accurate. One cannot assume accuracy
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