The default projection is Cylindrical, which allows displaying a chart in a proper way even in
high latitude areas.
Depths
Deep and shallow contours can be displayed in two different colors. Tick the checkbox for
Use two colours for waters
option to switch colors.
•
Safety contour
This function is used for setting a safe depth range for the given ship. The calculated safety
contour is equal to or larger than the entered value if the depth contour chosen is not
available on the chart. Safety contour highlights the safe navigation waters (See the
example below) on the chart and ECDIS gives an alarm if the ship is going to cross the
safety contour within the time limits specified in the safety guard zone parameters. By
default the safety contour is 30 m. If the safety contour specified by the mariner is not in
the SENC, the safety contour shown is the next deeper contour and the mariner is
informed in the Legend panel. ECDIS emphasizes the safety contour with a wide grey line
on the chart.
•
Safety depth
This is the depth, in meters, below sea level that is considered to be safe for the ship. This
is very important when the ship is approaching isolated dangers. On the chart the
soundings with a depth value lower than the Safety depth are displayed in dark grey but
the soundings with a depth value bigger are displayed in light grey color. Both soundings
can be displayed or hidden by checking on or off the check boxes “Deep Soundings“ and
“Shallow Soundings“ in the Presentation panels described above.
•
Safety height
This is the height, in meters, above sea level that is considered to be safe for the ship.
•
Deep contour:
This function is used for setting deep-water contour highlighted in the display of ENC
charts.
•
Shallow contour:
This function is used for setting a shallow water contour highlighted in the display of S-57
charts.
Ú
Note:
The safety depth must not be less than the safety contour value.
Ú
Note:
Depth information provided by ENC is not adjusted by tidal height.
Chart display depends on selected depth parameters.
on page 63 shows that one chart has three different presentations according to
different safety contour and shallow contour values.
Special Effects
ECDIS can make the light sectors flashing when the ship is closer to the lights than a fixed
distance.
Charts
| ECDIS900 Operator Manual
61