On Tue, 01 Mar 2005 05:28:01 GMT, "Colin W Kingsbury"
wrote in
. net::

But to be honest, what's more likely to fail? A couple of ruggedized
solid-state electronic devices in a waterproof bag, or a piece of machinery
built to jewelry precision and a stack of paper tables?

All it would take for both of them to fail is several days of dense
overcast weather. Perhaps a backup compass would be prudent. :-)