Raytheon Anschütz SYNAPSIS ECDIS, Operator'S Manual, Page: 352 / 434

Operator Manual
12--22
4343DOC020102 Edition: January 2016
Target Symbol Description of symbol
Heading lines Heading lines shall be selected for display for
activated AIS targets and associated targets,
represented by AIS target symbols.
Heading lines shall originate at the apex of the
AIS triangle and shall extend not less than 4
mm and at least 4 mm beyond the bow of the
true scaled outline when it is used. They shall
be drawn using a solid line style with the same
basic color as used for target symbols.
Heading lines for dangerous AIS target shall
flash with their base symbol until acknowl-
edged by the user.
An activated target without a reported heading
shall be orientated to the top of the operational
display area and when AIS heading is enabled
shall not include a heading line.
Heading lines --
turn indicators
The user shall select to display turn indicators
for activated AIS targets and associated tar-
gets represented by AIS target symbols.
Turn indicators shall be presented as a single
line extending at least 1 mm but not more than
2 mm perpendicular to the heading line in the
direction of turn. The indicator shall be drawn
using a thin solid line style with the same basic
color as used for their target symbols.
Turn indicators for dangerous targets shall be
the required color red (until no longer danger-
ous) and shall flash with their symbol until ac-
knowledged by the user.
Velocity vectors Velocity vectors for targets shall be selected
for display.
Velocity vectors shall be presented as single
lines originating at the targets’ tracked/reported
position and extending in the direction of
course CTW or COG, as appropriate, for a
length representing the distance the target will
travel in the time interval used for own ship’s
velocity vector. Vectors shall be drawn using a
thick short dashed line style with the same ba-
sic color used for target symbols.
Velocity vectors for dangerous targets shall be
the required red basic color and shall flash with
their base target symbols until acknowledged
by the user.
Once acknowledged, the symbols shall cease
flashing and unless considered as dangerous,
shall assume the basic color of other non--dan-
gerous target symbols.