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Equally good as taking a bearing on a paper plate dropped in one's wake
-- and far less polluting -- is to simply observe the wake itself!

Leeway arises from two causes:

1.  Drift in a sailboat due to the force vector from the sails not being
straight fore-and-aft; the sideways force can drive the boat sideways.
  I remember a very long time ago Ocean Navigator quoted a formula that
supposedly was fairly accurate for fin-keel sailboats.  Unfortunately,
I've lost it.

2.  Drift in any boat, power or sail, due to the windage of the hull.
This can be fairly substantial on a powerboat with a high, flared bow
such as found on sportfishermen.

Lu Abel

Clive wrote:
> Hi All;
>
> Back online again after a long while!
>
> Franks recent mail about using floating styrofoam reminds me that
> I suggested using this as a means of checking leeway (by back bearing on
> a floating paper plate) some while ago but nobody took this up I will
> try and revive it..
> Does  anyone know of a really good way of checking leeway?
>
> Clive.
>
> >

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