Setting Up Sonar - Garmin GPSMAP 4212 Owner's Manual

Using Sonar

Setting Up Sonar

Use the Sonar Setup screen to define and adjust settings universal to all sonar screens.
From the Home screen, select
Scroll Speed—adjusts the rate at which the sonar scrolls from right to left (Ultrascroll
Medium, or Slow). If you are using a speed-capable transducer, select
automatically adjust to the water speed of your boat.
Surface Noise—shows or hides the sonar returns near the surface of the water. Hide surface noise to
help reduce clutter.
Depth Line—quickly reference a specific depth (Show or Hide). When Show is selected, press up
Rocker
or down on the
A-Scope—creates a vertical flasher along the right side of the screen (On or Off).
Overlay Numbers—shows or hides water temperature, battery voltage, water speed (if your
transducer is capable), and navigation. If Auto is selected and the transducer is capable, the data is
shown.
Configuring Sonar Appearance
From the Home screen, select
Fish Symbols—sets how the sonar interprets suspended targets.
The chartplotter does not interpret the sonar return data (default).
Suspended targets appear as symbols. Background sonar information appears, making the
distinction between fish and structure easier.
Suspended targets appear as symbols with background information shown. The target
depth of each symbol is also indicated.
Suspended targets appear as symbols. No background information appears.
Suspended targets appear as symbols with no background information shown. The target
depth of each symbol is indicated.
Whiteline—highlights the strongest signal from the bottom to help identify its hardness or softness.
• Off—(default) Whiteline is disabled.
• High—the most sensitive setting. Almost all strong returns are highlighted in white.
• Medium—many strong returns are highlighted in white.
• Low—the least sensitive setting. Only the strongest returns are highlighted in white.
Color Scheme—choose white (black, if using Night mode colors) or blue. This affects the
background on all sonar screens, but does not change the Temp Log screen.
2
Sonar Sonar Setup.
>
to set the depth of the reference line.
Sonar > Sonar Setup
Auto
> Appearance.
GPSMAP 4000 Series Owner's Manual
, Fast,
®
to have the scroll speed