Tresco Radar Overlay - Operator’s manual
Page 16
User Instructions
For the general instructions, commands, features and options that can be used or
selected in
information mode
, please consult the “Tresco Navigis River Installation
and Operation” manual.
Additionally, in the pop-up menu, the following user commands can be selected:
AIS OFF, AIS ON or AIS LABELS
Switch to select if other vessels which are equipped with an AIS-transponder, are
made visible on the chart. How exactly the AIS-targets are shown, is selected in
the system setup configuration option in information mode. An octogon symbol
indicates a vessel with no transmitted heading information. When heading
information is received over AIS, the octagon switches to a triangle symbol. The
direction of the triangle indicates the vessels’ heading or bearing of the target and
the fine, dashed line which originates from the triangle, indicates the course-over-
ground. Note that the course and the heading may differ significantly depending
on actual sailing conditions (current, wind, actual rate-of-turn, …).
If the current display range allows an AIS vessel to be drawn on scale, you will see
the vessel outline when this data is received over AIS.
Switch to ‘AIS LABELS’ to select whether the other vessels should be labeled by its
AIS-transmitted name. Optionally the name can be accompanied by a vessel
number, a course and a speed indication.
Remark: the more information is put in a label, the larger the label is projected on
the screen. In a place (e.g. harbour) where a lot of vessels are transmitting there
AIS-info, screen-cluttering may occur. For this reason the AIS-labels are
automatically switched off after ten seconds. AIS-targets are still visible by their
octagon or triangular symbol.
Note
:
AIS-targets can only be shown if you have connected an AIS-receiver or AIS-
transponder to the PC used for navigation purposes. (The connection is made by a
serial NMEA 183 data-cable between the AIS hardware and the Tresco PC.)
CHART OFF, CHART MIN, CHART USER or CHART ALL
Select whether you want to see an electronic vector chart(S57 standard) or not.
If the quality of the position sensors and the heading sensors are OK, the chart will
be drawn if the user has selected ‘CHART MIN’, ‘CHART USER’ or ‘CHART ALL’.
When you select CHART OFF, the chart image will disappear. ( If ‘AIS ON’ or ‘AIS
LABELS’ is selected, targets will still be shown.) In this case the screen will be very
similar to the image as it is shown on the normal master radar-screen.
The density of displayed information of the Inland ECDIS chart is chosen by
selecting one of the following interface buttons:
“CHART MIN” :
minimum required navigational info
“CHART USER” :
user selectable info between minimum and maximum density,
and,
“CHART ALL” :
show all chart data available in the S57 SENC.
