Raytheon Pathfinder ECDIS Operator's Manual page 244

(3)
To insert a waypoint, first select the two waypoints that will be adjacent to the
inserted waypoint, then enter the new waypoint. ECDIS redraws the route to
include the inserted waypoint.
Step 3.1 Using the target cursor
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Operator Manual
Step 2.1
Figure: 1−10 Change Route
Option button Route: Inserting selected
Position the cursor over the waypoint that will precede the
inserted waypoint and click Enter.
Position the cursor over the waypoint that will follow the inserted way
point and click Enter.
Position the crosshairs at the location for the new waypoint and click
Enter key.
If you are inserting a waypoint before the first waypoint, position the
cursor over the first waypoint and click Enter.
Position the crosshairs at the location for the new waypoint and click
Enter key.
8−16
Step 2.2
Edition: 30.MAR.2007