Chapter 1 General Outline of Equipment
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1.1.3 Operation sequence of displays and alarms
Depending on the operation mode, the unit is activated and the dormant period countdown
starts. When the countdown ends, the following displays and alarms are triggered.
1) Visual Indication
At the end of this dormant period, the alarm system initiates a visual indication on the
bridge. The visible display is a blinking manner.
2) First Stage Bridge audible alarm (1st Stage Bridge audible alarm)
If not reset within 15 seconds since the visual indication is initiated, the BNWAS
additionally sounds a 1st stage bridge audible alarm on the bridge.
3) Second Stage Remote audible alarm (2nd Stage Remote audible alarm)
If not reset within 15 seconds since the 1st stage bridge audible alarm is initiated, the
BNWAS additionally sounds a 2nd stage remote audible alarm in the back-up officer's
and/or Master's location.
4) Third Stage Remote audible alarm (3rd Stage Remote audible alarm)
If not reset within 90 seconds (which can be set 0s, or between 90 ~ 180s) since the 2nd
stage remote audible alarm is initiated, the BNWAS additionally sounds a 3rd stage
remote audible alarm at the locations of further crew members.
Alarm sequence without acknowledgements
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