The GPSMAP 178 has everything you need in one space-saving package — GPS navigation, marine chartplotting, and powerful sonar. This combination chartplotter/sounder includes the same user-friendly interface as its color counterpart, the GPSMAP 178C, but sports a high-resolution monochrome display and a price that's within any mariner's budget.
The GPSMAP 178 packs a built-in worldwide marine basemap, state-of-the art processor with lightening-fast map redraw, and crisp, sunlight readable, 10-level grayscale display into a water resistant, space-saving console — perfect for large crafts and small runabouts alike. Boaters will love its convenient, intuitive design including:
simple keypad with backlighting for easy operation
one knob, adjustable tilt and swivel mount so you can quickly pop it in and out
front loading data cards for easy access
Users can enhance basemap detail on the GPSMAP 178 by simply plugging in data cards preprogrammed with BlueChart® or Fishing Hot Spots® detail or downloading data from optional MapSource CDs to an optional Garmin data card. BlueChart provides exceptional offshore marine coverage that includes shaded depth contours, navaids, shoreline, and more. For inland boating and fishing, the U.S. Recreational Lakes with Fishing Hot Spots CD & preprogrammed data cards are packed with inland lake maps, profiles, marinas, fishing areas and useful outdoor resources.
The GPSMAP 178 is available with either a single or dual-frequency transducer making it the perfect companion for offshore or inland lake fishing. Boaters can choose dedicated full-screen map, full-screen sonar, split-screen map/sonar, compass, and navigational screens — with customizable digital data fields for each page.