30. Steering With TOKYO KEIKI Autopilot PR-6000
30-10
30.4.5 Missing preconditions for route steering
When route steering is not used or the ECDIS did not accept the
requested route steering mode, there is no indication of route
steering mode in the route monitor window, as shown right.
There are several requirements to start route steering. When you make a selection in the route monitor window in
ECDIS, user guidance may appear if preconditions are not fulfilled. The user guidance window may appear when
you try to start any route steering mode or if you try to change one route steering mode to another. For more
information, see section 19.8 Filter Operation.
When you attempt to activate route steering without fulfilling preconditions, one of the following user guidance
dialog boxes appears:
Reason: You tried to activate a route steering mode
without the Kalman filter.
Remedy: Switch the Kalman filter "ON" and try again.
Reason: You tried to activate route steering outside of
channel limits.
Remedy: Steer vessel inside channel and try again.
Reason: You tried to activate a route steering mode
when the selection of the TO or FINAL waypoint is
missing or illegal.
Remedy: Check the TO and FINAL waypoints.
Reason: You tried to activate a route steering mode
without an independent speed source. You need either a
log, a dual-axis log or two position receivers.
Remedy: Check your selection of the sensors.
Reason: You tried to activate a route steering mode
when the route monitoring of the system detects that
your ship is turning, but your location is not within the
turn.
Remedy: Check and reset correct To WPT for route
monitoring.
Reason: You tried to activate a route steering mode
when there is a difference between current heading and
the required set heading that is greater than set with
Route start limit angle in the Route Parameters dialog
box.
Remedy: Steer vessel heading inside the limit of the
required set heading.
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