Bridge Navigational Watch Alarm System (B.N.W.A.S.)A report by O/S Red & O/S Derla

1. Objectives➔ Describe

the working principle of a Bridge Navigational Watch Alarm System.

➔ Determine

mandatory requirement on carriage of B.N.W.A.S.

HISTORY Propose by Danish/Bahamas Flags at IMO, Adopted by IMO June 2009 Submission after vessel collided with road bridge in Danish water Denmark Flag has this requirement for their vessels since 2003

What are the mandatory requirements on Carriage of BNWAS?

The Maritime Safety Committee at its 92nd session adopted Resolution MSC.350(92) with amendments toSOLAS coming into force on 1 January 2015. The amendments to SOLAS Chapter V now set a clear timeschedule for the implementation of a BNWAS for ships built before 1 July 2002 as follows:

Compliance:The Maritime Safety Committee at its 92nd session adopted Resolution MSC.350(92)

ADOPTION OF AMENDMENTS TO THE INTERNATIONAL CONVENTION FOR THE SAFETY

OF LIFE AT SEA, 1974. AS AMENDED

Regulation 19-Carriage requirements for shipborne navigational system and

equipment

2. Shipborne Navigational Equipments & Systems

2.2.3 A Bridge Navigational Watch Alarm System (BNWAS)

Implementation! Of BNWAS

passenger ships irrespective of size, not later than the first survey after 1 January 2016;

cargo ships of 3,000 gross tonnage and upwards, not later than the first survey* after 1 January 2016;

cargo ships of 500 gross tonnage and upwards but less than 3,000 gross tonnage, not later than the first survey* after 1 January 2017; and

cargo ships of 150 gross tonnage and upwards but less than 500 gross tonnage, not later than the first survey* after 1 January 2018.

FLAG AUTHORITIES REQUIREMENTS:

Martek Seab SAM Electrics Unisafe

Which classification societies is the system approved by? ABS, BV, CCS, ClassNK, CRS, DNV, GL, IR, KR, LR,

PR, RINA, RR, USCGDNV  GL, KR, RR,

DNV  DNV 

Is the system type approved to IEC 62616:2010? Equipped Equipped Equipped Equipped

Can the system be installed using a single cable type?  Equipped X Equipped Equipped

Is the system supplied with all screws, cable glands and cables? 

Equipped X X X

Does the system include a local PIR as standard?  Equipped X X X

Does the system include a serial communication interface to VDR?

Equipped X X X

Does the system include a battery back-up?  Equipped Equipped X Equipped

Does the system include a serial communication interface to VDR?

Equipped Equipped X Equipped

Does the system include alarm logging in real time? Equipped X X X

What is the standard warranty period?  36 Months X X X

Flag authority requirements:Bahamas Maritime Authority (BMA)The BMA stance on PIR as a reset method for BNWAS had previously been that they were not acceptable.

Estonian Maritime AdministrationThe Estonian Maritime Administration has outlined the minimum requirements of systems installed prior to 1st July 2011 in order to be recommended for exemption.

German Flag Authoritykeel laying date after 1st January 1988 have to be equipped with a fixed installed 'Bridge Watch Alarm'.

Greek Flag Statecomply with the IMO Resolution MSC.128 (75). and the International Standard IEC 62616.

Marshall IslandsA BNWAS installed after 1 July 2011 must be Type approved to meet the full requirements of MSC.128(75).

Maritime and Port Authority of Singapore (MPA)MPA Singapore have issued a circular (No.21 of 2010). MPA Singapore hold the view that PIR motion detectors are not acceptable as a method of resetting the BNWAS.

Principle Diagram

Timer reset function and

Visual indication

Watch Safety

Sequence:

Dormant

Pre Warning

1st Stage2nd Stage

3rd Stage

What are the Performance Standard for a Bridge Navigation Watch Alarm System (BNWAS)?

PERFORMANCE STANDARD1. OPERATION MODES

-Automatic-Manual ON-Manual OFF

2. Operational sequence of indications and alarms3. Reset function4. Emergency call facility5. Accuracy6. Security7. Malfunction Indication8. Operational controls (Ergonomic Criteria)9. Reset facilities10. Presentation of information

-Visual indications-First stage bridge audible alarm-Second and third stage remote audible alarm

PERFORMANCE STANDARD11. The equipment should comply with IMO resolutions A.694(17), A.813(19), theirassociated international standards3 and MSC/Circ.982 regarding Guidelines for Ergonomic Criteria for Bridge Equipment and Layout.

12. System physical integrity13. Reset devices14. Power supply15. INTERFACING

-Inputs-Outputs

What is the sole purpose of a Bridge Navigational Watch Alarm System?

The purpose of BNWAS (Bridge Navigational Watch Alarm System) is to monitor bridge activity and detect operator disability which could lead to marine accidents.

BNWAS monitors the watch officer’s presence through watch safety system functions.