5 GPSMAP 5000 Series Owner’s ManualUsing SonarUSinGS onarAdvanced Sonar SettingsTo adjust advanced sonar settings, touch Menu while viewing a sonar screen.Gain—control the sensitivity of the sonar receiver. Touch auto or touch Up or Down (or drag theadjustment bar) to manually adjust the gain. To see more detail, increase the gain. If the screen iscluttered, decrease the gain.Pause Sonar—select to stop scrolling. Touch Create Waypoint to save the location as a waypoint,and touch Resume to continue scrolling in real time. For more information on waypoints, seepage 25.Frequency—select how the frequencies appear on screen (200kHz, 50kHz, or Dual) when using adual frequency transducer.Zoom—zoom in to a section of the Full screen. The zoom is off (No Zoom) by default. Three otheroptions are available:2x Zoom—twice the magnification. Touch Up, Down, or auto to set the depth range of themagnified area.4x Zoom—four times the magnification. Touch Up, Down, or auto to set the depth range of themagnified area.Bottom Lock—lock the zoom window to the bottom. Touch Up or Down to set the depth rangeof the magnified area.Range—adjust the range of the depth scale on the right side of the screen. Touch auto or touch Upor Down (or drag the adjustment bar) to manually adjust the range.Sonar Setup—open the Sonar Setup screen (page 53).•••
