Simrad Maris ECDIS900 Operator's Manual page 250

Active leg window
Approaching turning point.
The tool is designed to help the user to decide when to start turning to be able to follow
exactly the active route.
It takes into account the distance the ship makes from the time navigator activates a turn till
time the ship actually starts to turn. Those values can be adjusted in the dialog "Distance to
start turn".
To access the settings push the button "Turning" in ship properties – page shape. If ship is for
some reason away from the active route the decision to start turn should be done using the
criteria of crossing the line passing through WOP and parallel to next route leg.
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