Re: [Paddlewise] Electric bilge pumps

From: Shawn Baker <shawnkayak_at_yahoo.com>
Date: Mon, 18 Aug 2003 20:43:50 -0700 (PDT)
Joan Spinner" <jspinner_at_peoplepc.com> wrote:
> Only problem with this is you can't use a compass with magnets around

  them.

Only one way to find out:  test it and see.  Rare earth magnets have a
much larger magnetic field than do regular ceramic magnets.

If you have a magnet mounted on the foredeck for a reed switch (say, N.
pole is UP), you could also epoxy another rare earth magnet in a
convenient (and nearby) spot under the deck with the N. pole DOWN), and
the magnetic field will largely be contained between the two magnets.

Instead of interfering with a compass 12-18" away, you'll have to be
half the distance or closer to notice magnetic disturbance in your
compass.

Shawn

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Received on Mon Aug 18 2003 - 20:43:53 PDT

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