Garmin GPSMAP 3210 Owner's Manual - Page 86

Using Sonar > Sonar Page Sonar Page The Sonar Page is where your GPSMAP 3206/3210 becomes a powerful fishfinder/flasher. If a GSD 20, GSD 21, or GSD 22 sounder module is not attached, the Sonar Page appears only when the GPSMAP 3206/3210 is in Simulator Mode or if the Sonar check box is selected on the System tab. To view the Sonar Page: Press Page repeatedly until the Sonar Page appears. Use the Fish Symbols option to view the actual sonar data, fish symbols, or a combination of both. Fish symbols appear as red. You can set the sonar display to show a split screen view of a zoomed portion of the sonar, split frequencies, bottom lock (display scaled from the bottom up) or a combination of these options. For example, you can choose to show dual frequency at a 2X zoom (Dual 2X) on one half and normal range dual frequency (Dual) returns on the other half. The display mode appears at the bottom of each sonar display. Sonar Depth line The sonar function window contains a right-to-left moving sonar image of the water beneath your boat. Items appear as they pass under the transducer. The most recent data is shown on the right side of the screen. The right side of the screen contains a scale reflecting the depth of the area being shown. The top left corner shows the depth, water temperature, and speed through water (if equipped with a temperature or speed sensor). 78 Sonar Page with Split Screen GPSMAP 3206/3210 Owner's Manual