Raytheon Pathfinder ECDIS Operator's Manual page 62

(1)
Steering is done manually. ECDIS automatically switches to Manual Steering
mode in the following situations:
(2)
Defined by an open route with established waypoints and a turning radius.
Steering may be done manually or by the autopilot. While steering to a track, the
information panel will display the active and next waypoints position, distance,
radius and time to go.
The max. turn radius from e.g. WP1 to WP2 may not be larger how 1355.
If you select the Steer to Track command while currently steering to a track, you
are temporarily switched to manual steering. ECDIS is waiting for you to provide
a new valid active waypoint. A valid active waypoint is defined by whether the
vessel can make the required turn to enter the route at that waypoint.
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Operator Manual
• Switching from Steering to Track to Steering to Course/Heading −
The active waypoint is cleared and ECDIS switches to Course Control
until a valid heading is entered.
• Switching from Steering to Course/Heading to Steer to Track −
The course line is removed and ECDIS switches to Course Control if a
valid active waypoint is selected and the data transmission between
ECDIS and Autopilot is established (see Raytheon Autopilot
Description NP2030, NP2035).
Steering Mode Manual Control
• When you select the Steer Manually command from Steering Mode
Selector Switch.
Steering Mode Track Control
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Edition: 30.MAR.2007