Sperry Marine Visionmaster FT ECDIS, User Manual

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ECDIS User Guide Basic Operation of ECDIS
3-55 65900012
The safety depth and height for each object are checked against the default
depth, height and contour settings in the Chart Depths/Heights window, see
Chart Depths/Heights in Chapter 4 Charts.
The proximity of dangers to own ship is indicated by the safety
check icon at the top right of the upper toolbar. When there are no
objects in the Dangers list the background colour of the icon is
shown in the system colour; when one or more items are added to the
Dangers list the icon colour changes to red (for Chart Danger alarms) or
yellow (for Chart Danger cautions).
In addition to the safety check icon, when items are added to the Dangers
list the Alerts button shows the most recent chart danger message on a red
flashing background colour when the chart danger has been defined as an
alarm. If the chart danger is defined as a warning, the Alert Status Indicator
will show the alert with a yellowish-orange flashing background.
Highlight Indicators
As part of the Safety Checking feature, the following highlighting indications
apply when ownship detects potential dangerous object of concern.
If the ownship Look-Ahead region intersects an object of
concern a boundary box will appear around the object. For
a “caution” object, this box will be displayed in yellow. If the
object is a “danger” the box will be displayed as red and
additionally the inside of the box will be shaded as semi-
transparent red.
If the ownship Look-Ahead region intersects a chart danger area, the
boundary of the chart danger within the Look-Ahead region will be
highlighted in red. Additionally the portion of danger area inside the region
will be shaded as semi-transparent red.
WARNING!
THE ABILITY TO DETECT CHART DANGERS IS RELIANT ON THE
QUALITY OF THE DATA CONTAINED IN THE LOADED AND
ENABLED CHART DATABASE AND THE QUALITY OF THE
VECTOR CHART COVERAGE. THE OPERATOR NEEDS TO BE
AWARE OF THE QUALITY OF THE DATABASE PRESENTLY
LOADED AND ENABLED FOR THE OPERATING AREA, AND
ALWAYS KEEP THE DATABASE UPDATED. IN ADDITION THE
OPERATOR MUST ALWAYS SET THE LOOK AHEAD RANGE (TIME
OR DISTANCE) TO AN APPROPRIATE VALUE CONSIDERING