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For quick small boat nav without a plotter, have a paper chart folded on your knee, align it to the coast (I'm assuming coastal pilotage) point your flat hand, held thumb upwards, at a known landmark then lay that angle off on the chart by moving your hand (keeping it parallel to the original bearing) so it is over the landmark. Note that line on the chart mentally, then repeat with a second landmark. That will give you a workable position in seconds with no tools or paraphenalia at all. You can do this without leaving the tiller & in any weather or sea conditions.

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brilliant !!
definitely going to try that out over the weekend. If it works I'll chuck the laptop!
Any more rule of thumbs of a similar nature?

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