Bridge navigational watch alarm system report presentation for Maritime students to learn its principle and the requirements carrying BNWAS.

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

2. 1. Objectives
➔ Describe
the working principle of a Bridge
Navigational Watch Alarm System.
➔ Determine
mandatory requirement on carriage
of B.N.W.A.S.

3. 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

4. What are the mandatory
requirements on Carriage of
BNWAS?

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

6. 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)

7. Implementation! Of BNWAS

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

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

10. 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

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

12. FLAG
AUTHORITIES
REQUIREMENTS:

13. 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, USCG
DNV
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

14. 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 Administration
The 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 Authority
keel laying date after 1st January 1988 have to be equipped with a fixed
installed 'Bridge Watch Alarm'.

15. Greek Flag State
comply with the IMO Resolution MSC.128 (75). and the International Standard IEC 62616.
Marshall Islands
A 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.

17. Principle Diagram

19. Timer reset
function
and Visual
indication

20. Dormant
Pre
Warning
1st
Stage
2nd
Stage
3rd
Stage

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

22. 1. OPERATION MODES
-Automatic
-Manual ON
-Manual OFF
2. Operational sequence of indications and alarms
3. Reset function
4. Emergency call facility
5. Accuracy
6. Security
7. Malfunction Indication
8. Operational controls (Ergonomic Criteria)
9. Reset facilities
10. Presentation of information
-Visual indications
-First stage bridge audible alarm
-Second and third stage remote audible alarm

23. 11. The equipment should comply with IMO resolutions A.694(17),
A.813(19), their
associated international standards3 and MSC/Circ.982 regarding
Guidelines for Ergonomic Criteria for Bridge Equipment and Layout.
12. System physical integrity
13. Reset devices
14. Power supply
15. INTERFACING
-Inputs
-Outputs

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