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The AlphaBNWAS is an aid to help protect the Ship’s Officers required to ensure a presence of the Officer of the Watch on the bridge and to carry out one man bridge duties. A BNWAS monitors bridge activity and detects any absence on the bridge that could lead to shipping accidents. The BNWAS system monitors the awareness of the Officer of the Watch (OOW) and warns the Master and/or another qualified Officer if the Officer of the Watch becomes incapable of performing duties through whatever cause.

The new MSC.128(75) rules will make a fully approved Bridge Navigational Watch Alarm System mandatory on SOLAS vessels of 150GT and up and passenger vessels irrespective of size, having to be installed from the 1st of July of 2011 up to 2015 depending on the type and GT of the vessel. Ship owners can now meet these requirements in a cost effective way by choosing the Alphatron Watch Alarm system called the ALPHA BNWAS.

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Features & Benefits

  • Ultra compact, single housing, the smallest BNWAS currently available, easy to fit
  • Operator friendly through a minimum number of clearly labelled and logically positioned buttons and indicators
  • Ergonomic design, looks equally well in a modern bridge console of a supertanker or superyacht
  • Cost effective design whilst meeting all IMO MSC.128(75) requirements
  • Extend-able by means of extra reset buttons and 2nd and 3rd stage alarm units
  • Reports to maximum 6 officers cabins with optional Officer Selector Switch
  • Preserve night vision through dimming function
  • Optional automatic switch-over functionality by auto pilot, if fitted
  • Optional interfacing with (S)VDR and CAS, if fitted
  • Lloyds Approved


  • Dimensions: 144 x 72 x 135mm (DIN)
  • Power supply: 18-33VDC
  • Current: 145mA
  • 4 outputs
  • Autopilot input
  • Reset input
  • Flush Mounting
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