Sperry Marine Visionmaster FT ECDIS, Руководство пользователя

Страница: 409 / 531

ECDIS User Guide Targets
65900012 10-5
AIS Targets
AIS Rendering Conditions
AIS targets are only rendered when the following conditions apply:

There is a valid position and heading for own ship

Enable Input is checked in AIS Display

The Sleeping Target filter setting is checked in AIS Display.

AIS target messages are being received and are valid.

Own ship's position in WGS84
40
datum is known.
When AIS targets are not being rendered, received AIS transmissions
continue to be stored so that known targets can be rendered quickly when
conditions indicate rendering should proceed.
For information on enabling AIS input and setting AIS filter settings,
including AIS objects, refer to AIS Display.
AIS Target States
AIS targets
41
are usually displayed on the chart display as triangles
(unless the AIS is a scaled ship symbol) and can be shown in one of the
following states:
Sleeping A sleeping target is smaller in size than an
activated target and is never displayed with
vectors.
Activated An activated target is displayed with
heading and speed/course vector. The
speed/course vector is a dashed line
originating from the centre of the triangle,
the length of line being proportional to the
vector time.
If heading data is missing or invalid the
course vector is shown in place of the
heading line. If neither heading nor COG
data is available the triangle is orientated
towards the top of the display area.
40
World Geodetic System 1984 (WGS-84) is a chart datum model used by chart makers to
map the earth’s surface.
41
If the target has an AIS target associated with it and the AIS target has a name assigned,
this name will be used and may not be changed. Names assigned to targets will be distributed
across all nodes in the system.