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Furuno Bridge Navigational Watch Alarm System: Inc BR-510 Main Alarm Panel, BR-520 Processor, 10m drop cable. BNWAS Overview The purpose of BNWAS (Bridge Navigational Watch Alarm S ystem) is to monitor bridge activity and detect operator disability which could lead to marine accidents. BNWAS monitors the watch officers presence through watch safety system functions. A watch officer is required to press the button on a Timer Reset Panel or to operate navigation equipment (e.g. ECDIS, Radar, etc.) at certain intervals. When the officer fails to press the button within pre-set intervals, visual and audible alarms will be generated in the wheelhouse. If the officer doesn't respond to the alarm, the system transfers the alarm to the Cabin Panels installed in other sections of the vessel in order to inform backup officers of the watch officers incapacity. Meets IMO resolution MSC.128(75) for "Bridge Navigational Watch Alarm System (BNWAS)" Monitors the watch officer's presence for maritime casualty avoidance Transmits alarm to the backup officer in accommodation, if watch officer fails to respond to the active alarm or emergency call Show more