Garmin has announced the GPSMAP 378 and 478 portable GPS navigators that come pre-loaded with a comprehensive set of maps and charts. The units are preloaded Land and Sea Cartography which make them ideal companions whether you’re sailing coastal waterways, boating on inland lakes, or driving across North America. The GPSMAP 478 features built-in Marine Detail Charts of the United States coastline, including Alaska and Hawaii and utilizes Garmin’s Bluechart g2 technology which all the details of a traditional Bluechart. For inland boaters and anglers, the GPSMAP 378 boasts 10-meter resolution for more than 3200 lakes. Both the units are waterproof to IEC 60529, IPX-7 standards (submersible to one meter for up to 30 minutes) and have a 256 color daylight readable TFT display. For road trips, the GPSMAP 378 and 478 come pre-loaded with MapSource City Navigator NT detailed street maps of the United States, Canada, and Puerto Rico.
(GPSMAP 478 pictured above)

Additionally, with the GXM 30 antenna (sold separately), the GPSMAP 378 and GPSMAP 478 can graphically display XM WX Satellite Weather data directly on the unit’s display — information like NEXRAD radar, storm cells, wind speeds, surface temperatures, forecasts, and more than a dozen other weather attributes. With the GXM 30 antenna the units can receive XM Satelitte Radio reception.
For Map transfer the units connect via USB and additional data can be transferred via the Data card slot.
The GPSMAP 378 and GPSMAP 478 are expected to be available in late May
2006 at an expected street price of $1199.99 each. An optional GXM 30 antenna (required for XM service) sells for $249.99 (MSRP).
Via – Garmin