Furuno FEA-2107-BB Operator's Manual page 518

30. Steering With TOKYO KEIKI Autopilot PR-6000
Alarm "2464 Route: No selected route" informs you that the there is no route selected for route monitoring.
Alarm "2465 Route: Illegal WPT" informs you that the there is a route selected for route monitoring, but the
selection of the next or final waypoint is missing or illegal.
Alarm "2510 Disabled: Out of turn" informs you that your ship is located outside of the graphical area of turning
(i.e. is linear part of track) and the track control system steering mode is Ass. Turn or Track Turn. Reselect correct
TO WPT for monitoring.
Alarm "2517 Disabled: In turn" informs you that the current location of your ship is in a turn of a monitored route.
Steer to a linear part of a monitored route to activate the track steering mode.
Alarm "2518 Disabled: Not accepted" informs you that the 30-second timeout period has passed after you pressed
the NAV and Enable switch buttons on the TOKYO KEIKI control panel. After you select GotoOS or GotoAW at
the ECDIS, you have 30 seconds to press the NAV and Enable switch buttons on the TOKYO KEIKI control panel,
otherwise alarm 2518 is given. Another reason can be that your ship has moved into a turning part of a monitored
route before you pressed the NAV and Enable switch buttons on the TOKYO KEIKI control panel.
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