How Is Ais Data Displayed; Ais Target Symbols - Raymarine E120W Reference Manual

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14.5 How is AIS data displayed?

Heading
Large
vessel
Direction
of turn
Small
vessel
Sleeping
target
Safety
critical data
The AIS system displays other AIS equipped vessels in the surrounding area as
triangular targets overlaid on a chart or radar window. Up to 100 targets are displayed.
As the vessel's status changes, the symbol for the target will change accordingly.
Vectors can be displayed for each target. These vectors indicate the direction of travel
and rate of turn of the vessel and the distance it will travel over a specified period of
time (COG/SOG vector). Targets displayed with their vectors are referred to as 'active
targets' and are scaled according to the size of the vessel. The larger the vessel the
larger the target. You can either display all targets or just dangerous targets (

AIS Target symbols

Sleeping target
Target not activated, dangerous or lost.
Activated target
Target activated i.e. AIS vector displayed.
Vector line (optional) shows predicted distance travelled within
given time.
Selected target
Target selected with cursor.
Can activate the target and view detailed data.
Dangerous target
Targets within specified distance (CPA) or time (TCPA).
Dangerous target alarm sounds if en-abled.
Target flashes.
Uncertain target
Calculated CPA/TCPA value uncertain.
Lost target
When signal of dangerous target not received for 20 seconds.
Target in latest predicted position.
Alarms sounds if enabled.
Target flashes.
E-Series Networked Display Reference Manual
097°T
11.6kt
1 .237nm
00h04m33s
COG/SOG
vector
Safe zone (defined by Dangerous
distance or time) target (flashes)
page 220
Direction
COG/SOG
of turn
vector
Heading
AIS
).
D8523-1