Ais Symbols - Furuno FMD-3200 Operator's Manual

14. AIS TARGET FUNCTIONS
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.
An indication of AIS target display capacity limit is given well before it is reached.
When 95% of the operator-set limit is reached for displayed AIS targets, the Alert 530
"AIS Target Display 95%" appears. When the operator-set limit is reached, the Alert
531 "AIS Target Display 100%" appears.
An indication of AIS target processing capacity limit is given well before it is reached.
The Alert 532 "AIS Target Capacity 95%" is given when 95 percent of 2,000 targets
are in the storage buffer and the Alert 533 "AIS Target Capacity 100%" is given when
2,000 targets or more are in the storage buffer. The system releases the AIS Alerts
"536 CPA/TCPA" and 537 "AIS Lost". Only active AIS targets generate alerts. The op-
erator can enable or disable AIS target alerts as desired. The feature "active and
sleeping AIS targets" is very effective for focusing on only those AIS targets which
need supervision. The ECDIS further eases the task of the operator by automatically
changing non-active targets to active targets, if they meet the dangerous target limits
set by CPA and TCPA.
14.2

AIS Symbols

Then the AIS is turned on, AIS targets are marked with appropriate AIS symbol as be-
low.
Default
Symbol
color
Green
Green
Green
ABC
Green
Red
14-2
Name
AIS tracked target past
position point
Sleeping AIS target
Activated AIS target
Activated target, true
scale symbol
Dangerous AIS target
Description
Marks a past position of an AIS target.
Denote sleeping AIS symbol. (Lines are
thinner than Active AIS symbol.)
Denote active AIS target, with vector.
Lines are thicker than sleeping AIS sym-
bol. Vessel name is shown (default set-
ting).
Active AIS target with symbol shown in
true scale.
Target's CPA and TCPA are within the
CPA and TCPA settings. Vector shown.