The Bridge Navigational Watch Alarm System (BNWAS) main purpose is to monitor the presence of watch offi cers and their alertness for early detection of unsafe sailing conditions.
The user can define an interval sequence of between 3 and 12 minutes. This will only give a visual indication. The alarm can be reset at any point in time. There is a visual indicator of the time countdown. After the preset interval, an alarm sequence will go into eff ect.
When the officer fails to acknowledge within pre-set intervals, visual and audible alarms will be generated in the wheelhouse and other crew spaces as necessary.
BNWAS will be mandatory for all new build passenger ships and cargo ships above 150 GT constructed on and after 1 July 2011 and will be phased in for existing ships over the coming years.