Ais Distress Signals; Navigating To A Distress Signal Transmission; Ais Distress Signal Device Targeting Symbols; Enabling Ais Transmission Test Alerts - Garmin GPSMAP 8400 series Owner's Manual

safe-zone area around your boat. The object is also labeled
as dangerous on the screen. When the alarm is off, the
message banner and audible alarm are disabled, but the
object is still labeled as dangerous on the screen.
2
Select Range.
3
Select a distance for the safe-zone radius around your
vessel.
4
Select Time To.
5
Select a time at which the alarm will sound if a target is
determined to intersect the safe zone.
For example, to be notified of a pending intersection 10
minutes before it will likely occur, set Time To to 10, and the
alarm will sound 10 minutes before the vessel intersects the
safe zone.

AIS Distress Signals

Self-contained AIS distress signal devices transmit emergency
position reports when activated. The chartplotter can receive
signals from Search and Rescue Transmitters (SART),
Emergency Position Indicating Radio Beacons (EPIRB), and
other man overboard signals. Distress signal transmissions are
different than standard AIS transmissions, so they appear
differently on the chartplotter. Instead of tracking a distress
signal transmission for collision avoidance, you track a distress
signal transmission to locate and assist a vessel or person.

Navigating to a Distress Signal Transmission

When you receive a distress signal transmission, a distress
signal alarm appears.
Select Review > Go To to begin navigation to the
transmission.

AIS Distress Signal Device Targeting Symbols

Symbol Description
AIS distress signal device transmission. Select to see more
information about the transmission and begin navigation.
Transmission lost.
Transmission test. Appears when a vessel initiates a test of
their distress signal device, and does not represent a true
emergency.
Transmission test lost.

Enabling AIS Transmission Test Alerts

To avoid a large number of test alerts and symbols in crowded
areas such as marinas, you can select to receive or ignore AIS
test messages. To test an AIS emergency device, you must
enable the chartplotter to receive test alerts.
1 Select Settings > Alarms > AIS.
2 Select an option:
• To receive or ignore Emergency Position Indicating Radio
Beacon (EPRIB) test signals, select AIS-EPIRB Test.
• To receive or ignore Man Overboard (MOB) test signals,
select AIS-MOB Test.
• 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.
8

Chart and 3D Chart View Settings

NOTE: Not all settings apply to all charts and 3D chart views.
Some options require premium maps or connected accessories,
such as radar.
These settings apply to the charts and 3D chart views, except
the radar overlay and Fish Eye 3D
page 9).
From a chart or a 3D chart view, select Menu.
Waypoints and Tracks: See
the Charts and Chart Views, page
Other Vessels: See Other Vessels Settings on the Charts and
Chart Views, page 9.
Quickdraw Contours: Turns on bottom contour drawing, and
allows you to create fishing map labels.
Surface Radar: Shows surface radar details on the Perspective
3D or Mariner's Eye 3D chart views.
Weather Radar: Shows weather radar imaging on the
Perspective 3D or Mariner's Eye 3D chart views.
Navaids: Shows navigational aids on the Fishing chart.
Sailing: When in sailing mode, adjusts the laylines
Settings, page 9) and starting line guidance.
Chart Setup: See

Navigation and Fishing Chart Setup,

page 8.
Chart Appearance: See Chart Appearance Settings, page
This might appear in the Chart Setup menu.
Edit Overlays: See Customizing the Data Overlays, page
This might appear in the Chart Setup menu.
Navigation and Fishing Chart Setup
NOTE: Not all settings apply to all charts and 3D chart views.
Some settings require external accessories or applicable
premium charts.
From the Navigation chart or Fishing chart, select Menu > Chart
Setup.
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
Water Overlay: Enables relief shading, which shows the
gradient of the bottom with shading, or sonar imagery, which
helps identify the density of the bottom. This feature is
available only with some premium maps.
Tides & Currents: Shows current station indicators and tide
station indicators on the chart
Indicators, page 6 and enables the tides and current slider,
which sets the time for which tides and currents are reported
on the map.
Roses: Shows a compass rose around your boat, indicating
compass direction oriented to the heading of the boat. A true
wind direction or apparent wind direction indicator appears if
the chartplotter is connected to a compatible marine wind
sensor. When in sailing mode, true and apparent wind are
shown on the wind rose.
Lake Level: Sets the present water level of the lake. This
feature is available only with some premium maps.
Inset Map: Shows a small map centered on your present
location.
Weather: Sets which weather items are shown on the chart,
when the chartplotter is connected to a compatible weather
receiver with an active subscription. Requires a compatible,
connected antenna and an active subscription.
Chart Appearance: See Chart Appearance Settings, page
(Fish Eye 3D Settings,
Waypoints and Tracks Settings on
9.
(Laylines
Showing Satellite
6.
Showing Tides and Current
Charts and 3D Chart Views
9.
3.
9.