User's Manual

Table Of Contents
NACOS Platinum
ED 3100 G 140 / 04 (2011-11)
Operating Instructions
C-1 Voyage Planning
C VOYAGE PLANNING & MONITORING.fm
C-30
Performing the Check
The check against the electronic chart must be started manually after the geometrical check was
successful. In this check, after a click on the Check Route button, the geographical shape of the track
1)
is compared with the data of the vector chart and with the user chart objects Own Safety Line and
Danger Highlight.
For the execution of the check, the display settings mentioned above under
Preparation
are not important.
What is important is the selection of the type of electronic chart and the setting of the Safety
Contour
2)
, see also above under Preparation.
For the verification of the route, the chart cells with the highest precision available on the system are
used as the basis. They might therefore differ from the cells used for the display. Because of this,
messages might occur which initially contradict the presentation of the pre-planned track in the vector
chart
3)
.
The results of the verification process are made visible
- in form of red rings shown along the route
- by small alarm icons in front of the lines in the waypoint and route lists.
Pointing on the colour markings in the chart or on the alarm icons in the list opens the respective tool
tips describing the detected violation between the route and the electronic chart (if vector charts are
used) and the user made chart objects.
Correcting the Track
Select ECDIS and Browse mode to be able to verify the complete route on screen.
If a waypoint is double clicked or it is selected and then in the context menu Go to Waypoint is clicked,
the respective waypoint to which the message refers is shown at the centre of the chart area.
Verify the causes for the violation and decide about the changes to be made to avoid it.
If appropriate, modify the relevant segment of the route and start the check again.
When the entire pre-planned track is shown without red ring symbols along the route and no alarm icons
are shown any more in route window, the check program did not find any violations.
It may happen that errors or warnings remain displayed but in reality there is no serious problem
going along that route. The quality of the check-results is mainly depending on the contents of the
electronic charts.
1)
The track considered during checking also includes the area corresponding to the actually set Safety
Corridor.
2)
The Safety Contour information of the ENC or other vector charts is not available in raster charts and must
therefore fully be replaced by manually generated Own Safety Lines and Danger Highlights.
3)
To clarify supposed contradictions of this kind, it is helpful to switch to a different range setting and to use
the Chart Info box where required.
Vector charts which have not been approved for navigational use or were not
updated by the user might contain errors.
Successful checking of the route on the basis of such vector charts does not guar-
antee that the ship can sail safely along the route.
It is under the responsibility of the operator to use a planned route for navigation,
irrespective if it was checked by the system successfully or with errors.