B-1
Appendix B Alert List 
 
 
 
 
Appendix B 
Alert List 
When an alert occurs, alert information is displayed in the alert notification area. 
 
 
The numbers displayed in the buttons indicate the number of such alerts that have occurred. 
 
Memo 
The alert button of a category that has not occurred will not be displayed. 
 
The display colours of alert messages are defined as follows according to the type and seriousness of 
alerts. 
 
Alert Type 
Alert Class 
(Seriousness) 
Display 
Colour 
Alert Display Status  Alert Sound 
Alarms 
(An alert indicating a state 
asking sailors to pay 
immediate attention and take 
immediate action.) 
Alarms  Red 
Before alarm 
acknowledgement:  
Blinking 
After alarm 
acknowledgement:  
Lighting 
Present 
(repetitive) 
Warnings 
(An alert indicating that the 
state has changed, which 
although is not immediately 
dangerous, but may become 
so in the near future if no 
action is taken. Warnings are 
alerts displayed for 
preventing possible future 
hazardous states.) 
Warnings  Orange 
Before alarm 
acknowledgement:  
Blinking 
After alarm 
acknowledgement:  
Lighting 
Present 
(once) 
Cautions 
(Although these are neither 
alarms nor warnings, these 
alerts indicate that it is 
necessary to pay more than 
normal attention to cautions, 
statuses, or to the supplied 
information.) 
Cautions  Yellow  Lighting  No sound 
No Alarm  -  Green  -  - 
   
Alert message 
Alarm button
Warning button
Caution button