Garmin GPSMAP 12 3 Series Owner's Manual page 50

Depth Layer Settings
From a chart, select Options > Layers > Chart > Depth.
Depth Shading: Specifies an upper and lower depth to shade between.
Shallow Shading: Sets the shades from the shoreline to the specified depth.
Spot Depths: Turns on spot soundings and sets a dangerous depth. Spot depths that are equal to or more
shallow than the dangerous depth are indicated by red text.
Fishing Contours: Sets the zoom level for a detailed view of bottom contours and depth soundings and
simplifies map presentation for optimal use while fishing.
My Vessel Layer Settings
From a chart, select Options > Layers > My Vessel.
Heading Line: Shows and adjusts the heading line, which is a line drawn on the map from the bow of the boat in
the direction of travel
Active Tracks: Shows the active track on the chart and opens the Active Track Options menu.
Wind Rose: Shows a visual representation of the wind angle or direction provided by the connected wind sensor
and sets the wind source.
Compass Rose: Shows a compass rose around your boat, indicating compass direction oriented to the heading
of the boat. Enabling this option disables the Wind Rose option.
Vessel Icon: Sets the icon that represents your present location on the chart.
Laylines Settings
To use the laylines features, you must connect a wind sensor to the chartplotter.
When in sailing mode (Setting the Vessel Type,
Laylines can be very helpful when racing.
From the Navigation chart, select Options > Layers > My Vessel > Laylines > Setup.
Sailing Ang.: Allows you to select how the device calculates laylines. The Actual option calculates the laylines
using the measured wind angle from the wind sensor. The Manual option calculates the laylines using
manually entered windward and leeward angles. The Polar Table option calculates the laylines based on the
imported polar table data
Windward Ang.: Allows you to set a layline based on the windward sailing angle.
Leeward Ang.: Allows you to set a layline based on the leeward sailing angle.
Tide Correction: Corrects the laylines based on the tide.
Layline Filter: Filters the layline data based on the time interval entered. For a smoother layline that filters out
some of the changes in the boat's heading or true wind angle, enter a higher number. For laylines that display
a higher sensitivity to changes in the boat's heading or true wind angle, enter a lower number.
38
(Setting the Heading Line and Angle Markers,
page 10), you can display laylines on the navigation chart.
(Importing a Polar Table Manually,
page 66).
page 62).
Charts and 3D Chart Views