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TURN IS ALWAYS ENABLED. THE ONLY WAY TO DISABLE THE AUTOMATIC TURN IS TO SELECT
ANOTHER STEERING MODE FROM YOKOGAWA AUTOPILOT
Note that alarm 2485 is programmable (the time before turn) and it is relative to the starting point of the manoeuvre.
See Figure.
At the moment the next waypoint is about to be reached, there will be a second alarm "2451 Route: WP approach
alarm".
Note that also alarm 2451 is programmable (the time before turn) and it is relative to the starting point of the
manoeuvre. See Figure below:
Prewarning
point
WP prewarn
alarm time
As soon as the ship arrives to the wheel over point the ECDIS sends a new course command to the autopilot and the
manoeuvre is started. During a manoeuvre the radar display and ECDIS display shows the CURVED EBL
indicating the planned radius for manoeuvre.
After the waypoint approach alarm the text "Route: turn
enabled" appears in Route Monitor window of ECDIS display.
During the turn the text "Route: turning" appears in Route
Monitor window of ECDIS display.
NOTE:
Approaching the last waypoint will give an alarm "2458 Route: Last WP approach". With Yokogawa autopilot
one should leave REMOTE mode of the Yokogawa autopilot before performing acknowledge of the alarm 2458.
This will terminate the route correctly. If one acknowledge alarm 2458, when Yokogawa autopilot is still in
REMOTE mode, then the route steering is automatically terminated and system generates alarm "2471 Autopilot
mode conflict".
Approach
Wheel Over Point
Point
WP approach
alarm time
WOP
forwarding
distance = f
Steering with Yokogawa Autopilot • • • • 389
Waypoint
WP
end of turn
radius
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