14. AIS TARGET FUNCTIONS
14-2
There can be several hundreds or several thousands AIS targets, and of those only a
few will be significant for your ship. To remove unnecessary AIS targets from the EC-
DIS display, the feature "active and sleeping AIS targets" is available. Initially any new
AIS target received by an AIS transponder is not-active (="sleeping"). Such non-active
targets are shown with a small triangle. The operator can pick any AIS target and
change it from non-active to active. Active AIS targets are shown with a large triangle
with speed vector, headline, rot indicator, etc. Further, the operator can pick active AIS
targets and change their status to non-active.
The feature "active and sleeping AIS targets" is very effective for focusing on only
those AIS targets which need supervision.
14.2 AIS Symbols
Then the AIS is turned on, AIS targets are marked with appropriate AIS symbol as be-
low.
Symbol
Default
color
Name Description
Green AIS tracked target past
position point
Marks a past position of an AIS target.
Green Sleeping AIS target Denotes sleeping AIS symbol. (Lines are
thinner than Active AIS symbol.)
Green Activated AIS target Denotes active AIS target, with vector.
Lines are thicker than sleeping AIS sym-
bol. The vessel name is shown (default
setting).
Green Activated target, true
scale symbol
Active AIS target with symbol shown in
true scale. Association AIS symbol or acti-
vate AIS symbol is displayed within the
ship’s symbol when activated. This symbol
disappears when the size of the true scale
symbol is smaller than 3 mm on the dis-
play.
Red Active AIS SART Active AIS SART target.
Green Selected AIS target AIS and TT target declared as "associa-
tion target". AIS symbol and AIS data are
used.
Green Heading-turn indicator Shows AIS target's direction of turning.
Green SAR Aircraft SAR Aircraft
Blue AIS Base Station AIS Base Station
Green AIS select symbol Target selected to display its data.
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