Because Raytheon has been so closely involved with the development of WAAS, its marine division will offer some of the first WAAS/GPS units for boaters this summer. The Raynav 300 and 301 will feature WAAS corrections on a five-inch monochrome screen, with a new and very fast 12-channel GPS receiver. The Raynav 300 will offer built-in WAAS correction and will list for about $900, while the Raynav 301 will contain both WAAS and conventional differential receivers and list for about $1,210. Both will feature NMEA and Seatalk interfacing, a track plotter, and a large readout of navigational data. Raytheon will also offer a stand-alone receiver, the RS 120, that will upgrade any late-model Raytheon GPS (as well as other brands) to WAAS. This is a small antenna about the size of an inverted teacup saucer that can be installed on a conventional antenna mount, or even flush-mounted into the deck, and is tough enough to walk on. Retail list price for the RS 120 will be about $635. For more information on these units, as well as when and where you can buy them, contact Raytheon at (800) 539-5539, ext. 2155.