Appendix A Alert and Maintenance INFO List A-2 
 
The list of alert messages by alert type is shown below. 
Each item in the “Subject” column indicates the following. 
TCS: Alert relating to the TCS function 
HCS: Alert relating to the HCS function 
INS: Alert relating to the INS function 
ECDIS: Alert relating to the ECDIS function 
RADAR/AIS: Alert relating to the RADAR/AIS function 
S-JOY: Alert relating to the S-JOY function 
MJS-9000: Alert relating to the MJS-9000 function 
Control unit: Alert relating to the control unit 
Display unit: Alert relating to the display unit 
Operation unit: Alert relating to the operation unit 
Power supply: Alert relating to power supply 
AIS: Alert relating to the AIS function 
Maintenance: Alert relating to maintenance 
Others: Other alert 
 
Types of alert categories is shown below. 
Category A: Alert about grounding, collision 
Category B: All alerts except category A 
 
A.1 Alarms 
Message Subject  Explanation  Category 
Actual course change  TCS  Arrival at Wheel Over Line Alarm was not 
acknowledged for 30 seconds. If the alarm is not 
acknowledged for an extra period of 30 seconds, 
Back-up Navigator Call is transferred to BNWAS. 
A 
Cross Track (Dev EX)  ECDIS  The off-track distance from the planned route 
exceeded the limit. 
A 
Crossing a User defined 
Alarm Object 
ECDIS  Crossing a User defined Alarm Object  A 
Crossing Safety 
Contour 
ECDIS  Crossing the safety contour  A 
Depth below keel  INS  Alarm on the depth below the keel  A 
Dragging anchor  ECDIS  Own ship exited from the dragging anchor 
monitoring area 
If Dragging anchor warning is not acknowledge for 2 
minutes, the warning escalates to alarm. 
A