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1 |P a g e W h a t

i sB N W A S ( B r i

d g e

N a v i g a t i o n a

l W a t c h

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A l a r m

S y s t e m ) ?

For more details

please

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visit:www.captyash

pal.logspot.com

Brid

ge

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Navig

ation

al

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Watc

h Ala

rm

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Syste

mBNWAS

stands !or BridgeNavigational

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Watch Alarm

System " a sa!ety

system which

haseen made

mandatory as per

amendments to

S#$AS %hapter

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& 'eglation *+

adopte

d on ,th-ne

//*.BNWAShas een

introdced with

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an aim to oserve

ridge activity

and detect

operatordisaility

which cold lead

to accidents. 0he

system monitors

the attentiveness

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o! the #!!icero!

the Watch

(##W) and

atomatically

alerts another

1ali!ied ##W

or the 2aster i!

!or anyreason the

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##W ecomes

incapale o!

per!orming the

##W3s

dties.Series o!

indications and

alarms are sed

to achieve this

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prpose. 0he

system is

designed toalert

!irst the ##W

and+ i! he4she

does not respond+

then to alert

another 1ali!ied

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##W or

the2aster.

Additionally+ the

BNWAS may

inclde a

provision o!

smmoning

immediateassista

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nce y ##W+ i!

re1ired.0he

BNWAS shold

e operational

whenever the

ship3s heading or

trac5 control

system

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isengaged+ nless

inhiited y the

2aster. 6t shold

also e sed at

anchor+ i!

appropriate.&esse

ls shold amend

the relevant

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operating

procedres

accordingly in

their

Sa!ety2anageme

nt System.As a

minimal

re1irement to

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comply with the

reglations+ the

system is

provided with

acontrol panel+

one re"set psh

tton+ one

ridge sonder+

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one level

sonder+ and one

level

7sonder.0he

!itting o!

BNWAS is a

mandatory

re1irement

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nder S#$AS

& 4 'eglation *

and assch the

system shold e

0ype Approved

nder the

%lassi!ication

Society the

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vessel

isregistered

with.BNWAS

shold comply

with the relevant

62#

per!ormance

standards.

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8owever+ i! the

vesselis !itted

with BNWAS

which was

installed onoard

prior to st

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-ly /9 she

may eeempted

!rom !ll

compliance with

the per!ormance

standards at the

discretion o! the

!lagstate.0he

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system may

either e a

l5head"

monted or

console monted

control panel.

Someman!actr

ers provide P6'

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(Passive 6n!ra"

'ed) movement

detector.

8owever+

certainclassi!icati

on societies (e.g.

$') do not

approve the se

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o! P6's as a

method o!

compliance.For

this reason P6's

are sally

provided in

addition to the

manal reset

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!nctionality.0he

carriage o! a

BNWAS+

complying with

62#

per!ormance

standards+ is

mandatory

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onships o! ,/

gross tonnage

and pwards and

passenger ships

irrespective o!

si;e+ with a

phasedcarriage

re1irement !or

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eisting ships+ as

!ollows:.

Ships o! ,/

gross tonnage

and pwards and

passenger ships

irrespective o!

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si;econstrcted

on or a!ter st

-ly /.

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2 |

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P a g e W h a t

i s

B N W A S ( B r i

d g eN a v i g a t i o n a

l W a t c hA l a r m

S y s t e m ) ?

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For more details

pleasevisit:www.captyash

pal.logspot.com.

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Passenger ships

irrespective o!

si;e constrcted

e!ore st -ly

/+ not later

than the!irst

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srvey a!ter st

-ly /.7.

Ships o! 7+///

gross tonnage

and pwards

constrcted

e!ore st -ly

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/+ not

laterthan the !irst

srvey a!ter st

-ly /.

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less than 7+///

gross tonnage+

constrctede!or

e st -ly /+

not later than the

!irst srvey a!ter

st -ly /7.,.

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Ships+ o! ,/

gross tonnage

and pwards t

less than ,//

gross tonnage

constrctede!or

e st -ly /+

not later than the

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!irst srvey a!ter

st -ly

/

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to anotheror

installed the net

time the vessel is

in dry"doc5.

Normally+ it is

more cost

e!!ective

toechange an

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old dead man

alarm with a new

BNWAS than

trying to pgrade

the old

system.0he

vessels net dry"

doc5ing is an

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ideal time to

install and i! the

system is

designed as

asimple

installation+ the

wor5 cold e

done whilst

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alongside or

dring passage.An eample o!

BNWAS

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