SOLAS regulations for the BNWAS lay down the performance parameters.
BNWAS installed before 1 July 2011 should preferably be of an approved type conforming to MSC.128(75) “Performance Standards for a Bridge Navigational Watch Alarm System (BNWAS)”. BNWAS installed thereafter are to be of an approved type conforming to MSC.128(75).
BNWAS equipment installed prior to 1 July 2011 for which conformance with MSC.128(75) cannot be documented may be exempted from full compliance with MSC.128(75) at the discretion of the Flag Administration (SOLAS Ch.V Reg.19.2.2.4). DNV will recommend applications for such exemptions when the system is in compliance with the rules for the NAUT-OC/-AW/-OSV class notations and/or when the system is provided with the following functionalities:
It should be confirmed that the BNWAS is suitable for installation on board ships through a test report, test certificate or manufacturer’s specification, or alternatively through a declaration from the vessel’s manager confirming that the system operates trouble-free.
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