ECDIS-E User Guide Routes
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the right of the speed automatically adjusts (minus if the speed is less than
the leg speed, plus if the speed is more). If the turn of speed entered is
greater than own ship's speed a validation error is generated.
Departing Leg
The Departing Leg area enables you to edit the following attributes of the
leg of the route, which departs from the selected waypoint:
Rhumb Line or Great Circle
Leg Speed - estimated average speed for the route leg. The
maximum speed is 99 kn.
XTD Limits - as in Approaching Leg attributes
The following leg attributes are read-only values which automatically
change if the route data is changed:
Leg distance - the leg distance between each waypoint.
Leg Bearing - the measured angle of the leg in true degrees.
To edit the Departing Leg data do the following:
1. To change the leg speed or XTD limit click in the relevant field the
text changes to green (editable). Move the trackball left or right to
change the values.
2. To change the departing or approaching leg from Rhumb Line to
Great Circle click on the drop down arrow to the right of the field.
Default Leg and Turn Attributes
The first leg of a route inherits planned speed and XTD limit attributes from
system configurable default values. Subsequent legs inherit attributes from
the preceding leg.
The first waypoint of a route inherits turn radius from a system configurable
default value, and turn speed from the preceding leg’s planned
speed. Subsequent waypoints inherit turn radius from the preceding
waypoint, and turn speed from the preceding leg. Turn rate is calculated
based on turn radius and turn speed, but turn rate may also be used to
adjust turn radius.
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