Operator's Manual

26. AUTOPILOT OPERATIONS
26-20
26.7.3 Alerts given when approaching a waypoint
This section provides examples of how the ECDIS responds to acknowledged, unac-
knowledged alerts when approaching a waypoint.
Condition 1: No acknowledgement to alerts
1. The vessel’s position is 90 seconds from the WOL.
2. The ECDIS releases the Early Course Change Indication (ECCI), which is the
Alert "150 Early Course Change Indication".
3. The ECCI is not acknowledged.
4. The vessel’s position is now 30 seconds from the WOL.
5. The ECDIS releases the Course Change Alarm (CCA), which is the Alert "152
Wheel Over Line".
6. The vessel passes the WOL.
7. 30 seconds after the vessel passes the WOL, the ECDIS outputs the Backup Nav-
igator Alarm (contact signal, N/O or N/C) to the BNWAS.
8. The CCA is acknowledged.
9. The ECDIS stops the Backup Navigator Alarm and resets the contact signal.
Condition 2: Early course change acknowledged, actual course change not
acknowledged
1. The vessel’s position is 90 seconds from the WOL.
2. The ECDIS releases the Early Course Change Indication (ECCI), which is the
Alert "150 Early Course Change Indication".
3. The ECCI is acknowledged.
4. The vessel’s position is 30 seconds from the WOL.
5. The ECDIS releases the Course Change Indication (CCI), which is the Alert "151
Actual Course Change Indication".
6. The CCI is not acknowledged.
7. When the vessel passes the WOL, the ECDIS releases the Course Change Alarm
(CCA), which is the Alert "152 Wheel Over Line".
8. The CCA is not acknowledged.
9. 30 seconds after the vessel passes the WOL, the ECDIS outputs the Backup Nav-
igator Alarm (contact signal, N/O or N/C) to the BNWAS.
10. The CCA is acknowledged.
WOL
No ACK
90 sec.
before WOL
30 sec.
before WOL
No ACK
30 sec.
after WOL
(1) ECCI
released
(2) CCA
released
(3) Backup
navigator alarm
released
No ACK