Turning Off Ais Reception; Chart Menu; Chart Layers; Chart Layer Settings - Garmin GPSMAP 7400 Owner's Manual

• To receive or ignore Search and Rescue Transponder
(SART) test signals, select AIS-SART Test.

Turning Off AIS Reception

AIS signal reception is turned on by default.
Select Settings > Other Vessels > AIS > Off.
All AIS functionality on all charts and 3D chart views is
disabled. This includes AIS vessel targeting and tracking,
collision alarms that result from AIS vessel targeting and
tracking, and the display of information about AIS vessels.

Chart Menu

NOTE: Not all settings apply to all charts. Some options require
premium maps or connected accessories, such as radar.
From a chart, select Menu.
Layers: Adjusts the appearance of the different items on the
charts (Chart Layers, page
Quickdraw Contours: Turns on bottom contour drawing, and
allows you to create fishing map labels
Contours Mapping, page
Settings: Adjusts the chart settings
Edit Overlays: Adjusts the data shown on the screen
(Customizing the Data Overlays, page

Chart Layers

The layers in the charts allow you to turn on and off and
customize features of the charts. Each setting is specific to the
chart or chart view being used.
NOTE: Not all settings apply to all charts and chartplotter
models. Some options require premium maps or connected
accessories.
From a chart, select Menu > Layers.
Chart: Shows and hides chart related items
Settings, page 10).
My Vessel: Shows and hides items relating to the boat
Vessel Layer Settings, page
User Data: Shows and hides user data, such as waypoints,
boundaries, and tracks, and opens user data lists
Layer Settings, page 10).
Other Vessels: Adjusts how other vessels are shown
Vessels Layer Settings, page
Water: Shows and hides depth items
page 11).
Quickdraw Contours: Shows and hides Garmin Quickdraw
data (Garmin Quickdraw Contours Settings, page
Tracks: Shows and hides tracks on the 3D chart view.
Range Rings: Shows and configures the appearance of range
rings on the 3D chart view. Range Rings help you to visualize
distances in some chart views.

Chart Layer Settings

From a chart, select Menu > Layers > Chart.
Satellite Photos: Shows high-resolution satellite images on the
land or on both land and sea portions of the Navigation chart,
when certain premium maps are used
Imagery on the Navigation Chart, page
Tides & Currents: Shows current station indicators and tide
station indicators on the chart
Indicators, page 8) and enables the tides and current slider,
which sets the time for which tides and currents are reported
on the map.
Navaids: Shows navigational aids on the chart.
Land POIs: Shows points of interest on land.
Photo Points: Shows camera icons for aerial photos
Aerial Photos of Landmarks, page
10
10).
(Garmin Quickdraw
11).
(Chart Settings, page
3).
(Chart Layer
10).
(User Data
(Other
11).
(Water Layer Settings,
13).
(Showing Satellite
8).
(Showing Tides and Current
(Viewing
8).
Service Points: Shows locations for marine services.
Depth: Adjusts the items on the depth layer
Settings, page

Depth Layer Settings

From a chart, select Menu > 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 Menu > 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
11). direction of travel
Markers, page
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
(My
the chartplotter.
When in sailing
display laylines on the navigation chart. Laylines can be very
helpful when racing.
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.
10).
(Setting the Heading Line and Angle
21).
modeSetting the Vessel Type, page
Charts and 3D Chart Views
(Depth Layer
3, you can