User's Manual Part 2

Operator Manual
Raytheon Marine GmbH
Germany
R
NSC 18
RADAR
2−105
3748DOC020102Edition: 14.JAN.2005
2.4.14.2 AIS symbols
The AIS symbols are assigned 5 different pieces of target information.
Depending on the situation, each symbol has a different meaning (see following
table).
AIS Target Symbol Description of symbol
AIS targets
Targets
SLEEPING
An isosceles, acute−angled triangle should be
used with its centriod representing the target’s
reference position. The most acuteapex of the
triangle is aligned with the heading of the target,
or with its COG, if heading information is not
available. The symbol of the sleeping target is
smaller than that of the activated target.
Activated AIS
targets
Targets
NORMAL
An isosceles, acute−angled triangle should be
used with its centriod representing the target’s
reference position. The most acute apex of the
triangle should be aligned with the heading of
the target, or with its COG, if heading informa-
tion is not available.
The COG/SOG vector is displayed as dashed
line starting at the centriod of the triangle.
The heading is be displayed as solid line of
fixed length starting at the apex of the triangle.
A flag on the heading indicates a turn and its
direction in order to detect a target manoeuvre
without delay.
Selected target
A square indicated by its corner is drawn
around the target symbol.
Dangerous
target
A bold line clearly distinguishable from the stan-
dard lines is used to draw the symbol may be
increased. The target displayed with: vector,
heading, and rate of turn indication. The symbol
flashes until the Dangerous Target Alarm is ac-
knowledged.
Lost target
A prominent solid line across the symbol, per-
pendicular to the last orientation of the symbol
is used. The line flashes until the Lost Target
Alarm is acknowledged. The target is displayed
without vector, heading and rate of turn indica-
tion.