Hi Bub

Something really basic like the Garmin eTrex is waterproof to IEC 529
IPX7 standards, and gives you basic trip data like current/Average
Speed, Distance covered etc. There's no mapping on the device, but it
can give you your position in a number of diffrerent formats to be
referenced against a chart.

Owen
Product Manager
www.globalpositioningsystems.co.uk

YooNoo LTD