![background image](http://html1.mh-extra.com/html/garmin/gpsmap-188-sounder/gpsmap-188-sounder_specifications_3752512001.webp)
The GPSMAP 188 —available in
grayscale or sunlight-readable color
display— and the GPSMAP 238 are
powerful dual frequency sounders.
They feature exceptional resolution,
fast redraw rates and split-screen
capability so you can view your
position and sounder information
at the same time. These units are
WAAS capable for 3-meter accuracy,
have built-in worldwide basemaps
with coastline detail, U.S. tide data
and inland features. They also accept
optional data cards with GARMIN’s
exclusive BlueChart
™
marine
cartography for additional detail.
Detailed chartplotter and sounder capabilities in one
GPSMAP
®
188/188C and 238 Sounder
WITH W
AAS
for even greater accuracy