NOTE: This item has been discontinued by Garmin. Check out the GPSMAP 420 (click here), with a revamped interface and BlueChart g2 Vision compatibility.
Looking for a new Garmin GPS and/or Sonar system? Click here to find one.
The GPSMAP 172C fixed-mount chartplotter offers brilliant sunlight-readable color LCD, robust features, and a user-friendly interface—in a compact, value-priced console.
It comes standard with a built-in worldwide marine basemap and accepts MapSource BlueChart offshore marine cartography—featuring detailed depth contours, inter-tidal zones, wrecks, navaids, and many other points of interest. For small-water anglers, the GPSMAP 172C is compatible with MapSource Recreational Lakes with Fishing Hot Spots—featuring fishing areas, boat ramps, marinas, and hazards for hundreds of popular U.S. and Canadian lakes. Pre-programmed data cards can be easily inserted into the slot on the front of the unit.
For added flexibility, mariners can upgrade the GPSMAP 172C to a full-fledged combination chartplotter/sounder at any time by adding a Garmin GSD 20 "black box" sonar and transducer.
GPSMAP 172C Features:
320 x 320-pixel, 256-color CFTN screen with adjustable CCFL backlight
3.2" W x 3.2" H (4.5" diagonal) viewing area
4.9" x 6.3" x 3.7" (W x H x D) unit dimensions
State-of-the-art 200 MHz processor makes data acquisition, panning, and zooming virtually instantaneous
User waypoints are automatically tagged with the date and time of creation
10,000 active track points and 1000 saved track points; database information can be stored on removable data cards and transferred to a PC or another unit
Sends, receives, and displays positioning data with DSC-equipped VHF radios
TracBack mode helps guide you back to points along a route
Tracklines can be color-coded for trolling or cruising applications
Package includes:
GPSMAP 172C with built-in Worldwide Marine basemap
Internal integrated GPS antenna
Power/data cable
Surface-mount bracket
User's manual
Quick-start guide 
