Garmin GPSMAP 640 - Manual (Page 39)

GPSMAP 620 and GPSMAP 640 Owner’s Manual 33
Marine Mode: Managing Information From Other Vessels
• Select Projected Heading , enter the projected heading time
for AIS-activated vessels, and select Done .
• Select Trails to show the tracks of AIS vessels, and select
the length of the track that appears using a trail.
Activating a Target for an AIS Vessel
1. From the Home screen, select Charts .
2. Select Navigation Chart , Fishing Chart , Perspective 3D , or
Mariner’s Eye 3D .
3. Touch an AIS vessel.
4. Select
AIS Vessel > Activate Target .
Viewing Information about a Targeted AIS Vessel
You can view the AIS signal status, MMSI, GPS speed, GPS
heading, and other information that is reported about a targeted AIS
vessel.
1. From the Home screen, select Charts .
2. Select Navigation Chart , Fishing Chart , Perspective 3D , or
Mariner’s Eye 3D .
3. Touch an AIS vessel.
4. Select
AIS Vessel .
Deactivating a Target for an AIS Vessel
1. From the Home screen, select Charts.
2. Select
Navigation Chart , Fishing Chart , Perspective 3D , or
Mariner’s Eye 3D .
3. Touch the AIS vessel.
4. Select
AIS Vessel > Deactivate Target .
Setting the AIS Alarm
The AIS alarm is used for collision avoidance, and can be
customized. All AIS alarm settings are applied to all charts and to
all 3D chart views.
1. From the Home screen, select Configure > Other Vessels >
AIS Alarm > On .
A message banner appears and an alarm sounds when an AIS-
activated vessel enters the safe-zone ring around your boat.
The object is also labeled as dangerous on the screen. The Off
setting disables the message banner and the audible alarm, but
the object is still labeled as dangerous on the screen.
2. Select Range to set the measured radius of the safe-zone ring
to a specified distance from 500 ft. to 2.0 nm (or from 150 m to
3.0 km, or from 500 ft. to 2.0 mi.).
3. Select a distance.
4. Select
Time To to sound an alarm if AIS determines that a
target will intersect the safe zone within the defined time interval
(ranging from 1 to 24 minutes).
5. Select a time.