Bridge Navigational Watch Alarm System

BNWAS monitors the watch officer’s 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 officer’s incapacity.


The BR-500 is constructed around a single processor, which secures a swift and simple installation. The processor can be placed anywhere under the bridge for easy connection with cabin alarm panels. Our main panel is approved as a voice alarm on the bridge. This differentiates from competing products where, in order to fulfil the IMO requirements, the requirement of an extra alarm panel for the bridge is needed.

The BR-500 standard package contains:


  • Main alarm panel BR-510
  • Processor unit BR-520
  • 10 m cable (from the processor unit to the main alarm panel)
  • Standard spares, installation materials and a manual





  • Meets the IMO resolution MSC.128(75) for BridgeNavigational Watch Alarm System (BNWAS)
  • Monitors the watch officer's presence for maritime casualty avoidance
  • Transfers the watch alarm to the back-up officer, in the event that the watch officer fails to respond to watch pre-warning or watch alarm
  • Quick access push keys for Navigation Officer's Call and Emergency Call
  • Notifies Back-Up Navigators when TCS (Track Control System, option) has failed
  • Outputs ALR sentence for VDR
  • Optional Motion Detector and Flash Beacon available
  • Set-up menu is protected by password
  • Mode selection (Manual OFF, Manual ON, AUTO)
  • Timer interval (3 to 12 min.)
  • System test
  • Easy to read alphanumeric and graphic presentations
  • Multilanguage available English, Japanese, Russian, Chinese and Korean