While good boat hardware and mechanical equipment is usually in production for years with little change, many marine electronics are outmoded the moment they hit the retail stores. Chances are that many of the marine electronics we tested in 2006 won’t be around in 2007. In fact, some are already being upgraded, and at least one product we rated tops in 2006, the West Marine CS Plus handheld GPS, is already out of production. While the next evolution of these products (digital radar will soon be the rage) will be faster and more powerful, the following five products should serve sailors just fine for years to come.…