I would like to thank all of the creative people who gave me ideas.  I clipped
them all together and used them to run a brainstorming session.  So, in effect,
you were all there.  As you may remember, the problem was that at 200ft
underwater, the effective pressure on a 1/4" button is 4.5 lbs.  If you make the
switch for 5lb acuation pressure, then at the surface, you need fingers like a
gorilla.

The final decision was embarrassingly simple.  Instead of using pushbuttons,
we will use rocker switches with a waterproof boot.  Each rocker is center
off, momentary in each direction.  The boot will make is seem like a keypad
and we paired the functions.  The pressure is equalized so the net effect is
zero and we can have <1lb accuation forces.  This will be tested in the pressure
tank this week.  I figure that I owed the group this info.

Thanks again,
Steve Nordhauser
Director of New Product Development, Imaging Systems
IEM Corp

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