User's Manual

Table Of Contents
NACOS Platinum
ED 3100 G 110 / 02 (2011-10)
Operating Instructions
A-9 CHARTRADAR (optional)
A RADAR.fm / 10.11.11
A-104
9.6 Setting the Depths Lines to be Displayed in the Vector Chart
In the display of the vector charts, it is possible to use colour to clearly distinguish the navigable areas
from the non-navigable ones, depending on the draught of the ship. Navigable areas are displayed in
black or darkgrey, non-navigable areas darkblue or blue. The boundary between navigable and non-navi-
gable areas is the Safety Contour.
The Safety Contour is particularly important because it is also a basis for the ECDIS Monitoring and for
the checking of the pre-planned route.
It is also possible to distinguish between two areas with different depth ranges, inside the navigable area
as well as inside the non-navigable area :
- Within the navigable area, the Deep Contour differentiates between the adequately deep areas
displayed in darkgrey and the deeper areas displayed in black.
- Within the non-navigable area, the Shallow Contour differentiates between the areas displayed in
darkblue which are adjacent to the navigable area, and the even shallower areas displayed in blue.
Fig. A / 24 Diagram of the depth contour system
Spot soundings from individual measurements are displayed more prominently if they project beyond a
particular depth. This depth is set as the Safety Depth. This situation is shown graphically in the figure
above.
The respective colour settings for the Shallow and Deep Contour as well as the Safety Depth and
the Safety Contour are adjusted on the Depth panel of the ENC expander:
Wrong or inadequate setting of especially the Safety-Depth and/or Safety Contour can give
a wrong impression of navigable/non-navigable areas displayed on your chart. Both values
shall be selected with sufficient safety depending on the draft of your ship.
Chart zero
Shallow contour
Safety contour
Deep contour
Safety depth
Draft
Brown Green Blue Darkblue Darkgrey Black
Non-navigable area Navigable area