GPSMAP 5000 Series Owner’s Manual 5uSInG SonarusInGsonarlow—the least sensitive setting. Only the strongest returns are highlighted in white.Overlay Numbers—shows or hides water temperature, water speed (if your transducer is capable),and navigation.NOTE: To show water temperature or water speed, change the setting to Auto. If the connectedtransducer is capable, the data is shown.Advanced Sonar SettingsTo adjust advanced sonar settings, touch Menu while viewing a sonar screen.Range—the range of the depth scale on the right side of the screen (Auto or touch Up or Down tomanually adjust).Gain—controls the sensitivity of the sonar receiver (Auto or touch Up or Down to manually adjust).To see more detail, increase the gain. If the screen is cluttered, decrease the gain.Frequency—when using a dual frequency transducer, selects how the frequencies appear on screen(200kHz, 50kHz, or Dual).Zoom—zooms in to a section of the Full Screen. The zoom is off (No Zoom) by default. Threeoptions are available:2x Zoom—twice the magnification. Select up, Down, or Auto to set the depth range that isbeing magnified.4x Zoom—four times the magnification. Select up, Down, or Auto to set the depth range thatis being magnified.Bottom lock—locks the zoom window to the bottom. Select up or Down to set the depthrange.Depth line—quickly references a specific depth (On or Off). When On is selected, touch and dragthe line to set the depth of the reference line.A-scope—a vertical flasher along the right side of the screen (On or Off).sonar setup—opens the Sonar Setup screen. See page 50.••••