Вот такой девайс никто не тестил - http://www.dealextreme.com/details.dx/sku.13235 ?

защита IPX7 - достаточно для виндсерфинга ?

"Most newer GPS units are waterproof in accordance with IEC 60529 IPX7. IEC 60529 is a European system of test specification standards for classifying the degrees of protection provided by the enclosures of electrical equipment. An IPX7 designation means the GPS case can withstand accidental immersion in one meter of water for up to 30 minutes. An IPX8 designation is for continuous underwater use.""Most newer GPS units are waterproof in accordance with IEC 60529 IPX7. IEC 60529 is a European system of test specification standards for classifying the degrees of protection provided by the enclosures of electrical equipment. An IPX7 designation means the GPS case can withstand accidental immersion in one meter of water for up to 30 minutes. An IPX8 designation is for continuous underwater use."


вроде и обратный таймер есть со звонком ...