Garmin GPSMAP A12, Owner'S Manual

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From the navigation chart, select Menu > Layers > My Vessel >
Laylines > Setup .
Display : Sets how the laylines and vessel appear on the chart,
and sets the length of the laylines.
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.
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.
User Data Layer Settings
You can show user data, such as waypoints, boundaries, and
tracks, on the charts.
From a chart, select
Menu > Layers > User Data .
Waypoints : Shows waypoints on the chart and opens the list of
waypoints.
Boundaries : Shows boundaries on the chart and opens the list
of boundaries.
Tracks : Shows tracks on the chart.
Other Vessels Layer Settings
NOTE: These options require connected accessories, such as
an AIS receiver, radar, or VHF radio.
From a chart, select
Menu > Layers > Other Vessels .
DSC : Sets how DSC vessels and trails appear on the chart, and
shows the DSC list.
AIS : Sets how AIS vessels and trails appear on the chart, and
shows the AIS list.
MARPA : Sets how MARPA vessels and trails appear on the
chart, and shows the MARPA list.
Details : Shows other vessel details on the chart.
Proj. Heading : Sets the projected heading time for AIS-
activated and MARPA-tagged vessels.
Collision Alarm : Sets the safe-zone collision alarm ( Setting the
Safe-Zone Collision Alarm , page 10 ).
Water Layer Settings
From a chart, select Menu > Layers > Water .
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.
Relief Shading : Shows the gradient of the bottom with shading.
This feature is available only with some premium maps.
Sonar Imagery : Shows sonar imagery to help show the density
of the bottom. This feature is available only with some
premium maps.
Lake Level : Sets the present water level of the lake. This
feature is available only with some premium maps.
Weather Layer Settings
From the Navigation or Fishing chart, select Menu > Layers >
Chart > Weather > .
From a weather chart, select Menu > Layers > Chart >
Weather .
Observed Layers : Sets which observed weather items are
shown. Observed weather is the present weather condition
that are visible now.
Forecast Layers : Sets which forecasted weather items are
shown.
Layer Mode : Shows forecasted or observed weather
information.
Loop : Shows a loop of forecasted or observed weather
information.
Legend : Shows the weather legend, with the severity of the
conditions increasing from left to right.
Weather Subscription : Shows weather subscription
information.
Restore Defaults : Resets the weather settings to factory default
values.
Edit Overlays : Adjusts the data shown on the screen
( Customizing the Data Overlays , page 3 ).
Radar Overlay Settings
From the Navigation or Fishing chart, select Menu > Layers >
Radar > .
From a radar screen, select Menu .
Radar To Standby : Stops radar transmission.
Gain : Adjusts the gain ( Adjusting Gain on the Radar Screen
Automatically , page 34 ).
Sea Clutter : Adjusts the sea clutter ( Adjusting Gain on the
Radar Screen Automatically , page 34 ).
Radar Options : Opens the radar options menu ( Radar Options
Menu , page 35 ).
Other Vessels : Sets how other vessels are displayed on the
radar view ( Other Vessels Layer Settings , page 12 ).
Radar Setup : Opens the radar display settings ( Radar Setup
Menu , page 36 ).
Edit Overlays : Adjusts the data shown on the screen
( Customizing the Data Overlays , page 3 ).
Chart Settings
NOTE: Not all settings apply to all charts and 3D chart views.
Some settings require external accessories or applicable
premium charts.
From a chart, select
Menu > Settings .
Orientation : Sets the perspective of the map.
Detail : Adjusts the amount of detail shown on the map, at
different zoom levels.
Chart Size : Sets the visible size of the chart.
World Map : Uses either a basic world map or a shaded relief
map on the chart. These differences are visible only when
zoomed out too far to see the detailed charts.
Start Line : Sets the starting line for the sailing race Setting the
Starting Line , page 21 .
Inset Map : Shows a small map centered on your present
location.
Fish Eye 3D Settings
NOTE: This feature is available with premium charts, in some
areas.
From the Fish Eye 3D chart view, select Menu.
View : Sets the perspective of the 3D chart view.
Tracks : Shows tracks.
12 Charts and 3D Chart Views