User's Manual

Table Of Contents
NACOS Platinum
ED 3100 G 140 / 04 (2011-11)
Operating Instructions
C-2 Chart and Route Monitoring
C VOYAGE PLANNING & MONITORING.fm
C-42
2.2.2 Monitoring against User Symbols
If an Own Safety Line is touched or crossed by the guard sector, the Obstruction Ahead alarm
appears in the Alarm List. The alarm appears only if the own safety line is touched from within the safe
area. The non safe side of the area behind the safety line is indicated by small hachure lines.
The same alarm is issued if one of the user-made Symbols (e.g. buoys, beacons, wrecks or other under-
water hazards) is touched by the look-ahead sector.
If an area belonging to the object class Danger Highlight is touched by the guard sector, the alarm
Area with Special Conditions appears.
Activation of the guard sector for this monitoring of the user-made chart objects is performed in the
menu Alarms > ECDIS Alerts where also the other alarms can be activated or suppressed.
User Chart Objects on Raster Charts
Because the user-made own safety lines, danger highlights and symbols are available independently
of the chart type, this part of the chart monitoring process can also be performed if raster charts
are used
1)
.
It is urgently recommended
2)
that, if raster charts are used, the dangerous areas and objects and
(for example) traffic separation zones should be marked by means of own safety lines or danger
highlights in order to support the navigator with a basic automatic chart monitoring function.
USEFUL INFORMATION
Details of the Chart Monitoring Alarms and Indications
Supplementing information about the chart monitoring results is shown in combination with a circular
symbol in the chart or by opening the Info window at this location after clicking with MORE into the
chart. If you hold the cursor on a circular symbol, a tool-tip window is shown, containing the chart alarm
list with all violations found in the chart at this position.
Repetition of the Alarms
If, for example, the ship is sailing along a line of buoys and is too close to them, the alarm Crossing a
Danger appears only for the first buoy, but it can be acknowledged and remains in the alarm list until
this type of violation is no longer found within the guard sector. Thereafter a new violation can activate
the same alarm again.
1)
Raster Charts are not yet available in the Platinum ECDIS
2)
On ships with DNV approval this is a compulsory requirement.
An alarm is only repeated if an object belonging to a different object class is
touched or if the same object class is touched within a smaller distance or time.