Automatic Identification System - Garmin GPSMAP 740 Owner's Manual

Charts and 3D Chart Views
Showing Other Vessels
See "Configuring the Appearance of Other Vessels"
Showing and Configuring Data Overlay
See "About Chart Overlay Numbers"
Using Waypoints
See "Waypoints" (page
Using Tracks
See "Tracks" (page 30).

Automatic Identification System

The Automatic Identification System (AIS) enables you to identify and track other vessels.
About AIS
AIS alerts you to area traffic. When connected to an external AIS device, the chartplotter can show some
AIS information about other vessels that are within range, that are equipped with a transponder, and that are
actively transmitting AIS information. The information reported for each vessel includes the Maritime Mobile
Service Identity (MMSI), the location, the GPS speed, the GPS heading, the time that has elapsed since the last
position of the vessel was reported, the nearest approach, and the time to the nearest approach.
➊
➌
➎
➏
About AIS Search and Rescue Transmitters
AIS Search and Rescue Transmitters (AIS-SART, or SART) are self-contained devices that transmit
emergency position reports when activated. SART transmissions are different than standard AIS transmissions,
so they look different than standard AIS symbols on the chartplotter. Instead of tracking a SART transmission
for collision avoidance, you track a SART transmission to locate and assist a vessel.
Navigating to a SART Transmission
When you receive a SART transmission, a distress signal alarm appears.
Select Review > Go To to begin navigation to the SART transmission.
AIS Targeting Symbols
Symbol Description
AIS Target is activated. The target appears larger on the chart. A green line attached
➊
to the target indicates the heading of the target. The MMSI, speed, and direction of the
vessel appear beneath the target, if the details setting is set to Show
transmission from the vessel is lost, a message banner appears.
Dangerous target is lost. A red X indicates that the AIS transmission from the vessel is
➋
lost, and the chartplotter displays a message banner asking whether the vessel should
continue to be tracked. If you discontinue vessel tracking, the lost dangerous target
symbol disappears from the chart or the 3D chart view.
AIS vessel. The vessel is reporting AIS information. The direction in which the triangle is
➌
pointing indicates the direction in which the AIS vessel is moving.
12
(page 48).
26).
AIS Targeting on the Navigation Chart
(page 50).
GPSMAP 700 Series Owner's Manual
➋
➍
(page 14). If the AIS