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GMDSS AIS VDR sVDR LRIT ECDIS Inmarsat Systems and General Shipboard Electronics
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Bridge Navigation Watch Alarm System
The BNWAS is an alarm system on the bridge which activates at chosen intervals of between 3 and 12 minutes. It requires duty personnel to acknowledge the 'alarm' to indicate their mental alertness. If the alarm goes unacknowledged a sequence of further alarms alerts off duty personnel. The alarm should be operational whenever the ship's heading or track control system is engaged, unless inhibited by the Master.
The BNWAS also has a function for calling for assistance to the bridge.
IMO Resolution MSC.128(75) lays down the peformance standards of the system.
Eiland Communciations is able to offer and/or install the KW810 BNWAS which is type approved to IEC 62616:2009 FDIS and IEC 60945:2002 and conforms to the requirements of IMO Resolution MSC.128(75) Performance Standards for a Bridge Navigational Watch Alarm System (BNWAS).
Two
options are offered, either push button or motion sensor.
Extract from MSC128 (75)
4.1.2 Operational sequence of indications and alarms.
4.1.2.1 Once operational, the alarm system should remain dormant
for a period of between 3 and 12 min (Td).
4.1.2.2 At the end of this dormant period, the alarm system should
initiate a visual indication on the bridge.
4.1.2.3 If not reset, the BNWAS should additionally sound a first
stage audible alarm on the bridge 15 s after the visual indication
is initiated.
4.1.2.4 If not reset, the BNWAS should additionally sound a second
stage remote audible alarm in the back-up officer’s and/or
Master’s location 15 s after the first stage audible alarm is initiated.
4.1.2.5 If not reset, the BNWAS should additionally sound a
third stage remote audible alarm at the locations of further
crew members capable of taking corrective actions 90 s after the
second stage remote audible alarm is initiated.
Carriage Requirements for Ships on ALL Voyages (Not just International)
1st July 2011 on or after for all new builds of 150 gt or over - (keel lay base)
Ships constructed prior to 1st July 2011 will have to fit the BNWAS
by the 1st survey after:
1st July 2012 for cargo ships of 3000 gt or over and
for all passenger ships of any size.
1st July 2013 for cargo ships of 500 gt or over but less than
3000 gt.
1st July 2014 for cargo ships of between 150 gt or over but less
than 500 gt.
BNWAS Downloads