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Vessel Stabilit

y

BOS-

P

RD-2

6

.900

6

01

T

an

k

s

conta

i

n

i

n

g

s

l

ac

k liq

u

i

ds

should

be

k

e

p

t

to a m

i

n

i

mum

.

M

i

n

i

m

i

se

free

surface moments

by

k

ee

p

i

n

g

tan

k

s

fu

ll

or

dry

,

w

henever

p

oss

i

b

l

e

.

W

hen a

tan

k i

s

to be ba

ll

asted at

sea

,

to

counteract

the

l

oss

of

consumab

l

es

i

t

shou

l

d be

noted

that:

x

T

he

tan

k

s

shall

have

a

com

p

l

ete

free

surface as

soon

as

ba

ll

ast

i

n

g

commences

;

x

T

he

free

surface

shall

adverse

l

y

affect

the

stab

ili

ty

of

the

vesse

l

before

any

benef

i

t

can

be

assumed

from

the

w

e

i

g

ht of

ba

ll

ast

w

ater

ta

k

en on

board

.

4

.

2

.

3 C

on

s

um

able ta

n

ks

FO

/

LO

tan

k

s:

90%

f

illi

n

g w

hen

an overf

l

o

w

system

i

s

i

nsta

ll

ed

.

I

f

there

are

no

overf

l

o

w

system

/

tan

k

s

and

for

o

p

erat

i

on

reasons

,

the

f

illi

n

g

i

s

li

m

i

ted

to

80

/

8

5

%, FS

M

correct

i

on

should

be du

l

y

ta

k

en

i

nto account

.

F

resh

w

ater

tan

k

s:

98

/

100%

f

illi

n

g

.

4

.

2

.

4 C

a

rgo

ta

n

ks

W

hen

liq

u

i

d

car

g

o

i

s

to

be

l

oaded

or

d

i

schar

g

ed

,

as

soon

as

p

um

p

i

n

g

has commenced

a

fu

ll

free

surface

shall

e

xi

st

i

n

those

tan

k

s

be

i

n

g

p

um

p

ed

and

the

effect

th

i

s

has

on

the

stab

ili

ty

of

the

vesse

l

ta

k

en

i

nto

account

.

4

.

2

.

5 A

n

ti

-ro

ll ta

n

ks/

f

l

um

e ta

n

ks

A

nt

i-

ro

ll

tan

k

s

shall

be

f

ill

ed

for

standard

sea

-

state

o

p

erat

i

on

and

ta

k

en

i

n

to

account

for

a

ll

stab

ili

ty

ca

l

cu

l

at

i

ons

.

5

0%

f

illi

n

g

shall

be

assumed

i

n

absence of

i

nformat

i

on

on

the

system

.

A

nt

i-

ro

ll

tan

k

s

shall

be

dry or

f

ill

ed at

100%

for

li

ft

i

n

g

,

and

/

or

to

w

i

n

g/

anchor

-

hand

li

n

g

o

p

erat

i

ons

.

4

.

2

.

6 A

n

ti

-

h

eel ta

n

ks

U

n

l

ess

s

p

ec

i

f

i

ed

i

n

the

a

pp

roved

stab

ili

ty

documentat

i

on

, i

t

i

s

not

a

ll

o

w

ed

to

ba

ll

ast

the

sh

i

p

dur

i

n

g

crane

movements

.

D

ur

i

n

g

the

li

ft

i

n

g

p

rocedure

the

ma

xi

mum

an

g

l

e

of

hee

l i

s

determ

i

ned

i

n

the

a

pp

roved

stab

ili

ty

documentat

i

on

.

W

hen

the ma

xi

mum

crane

o

p

erat

i

n

g

an

g

l

e

i

s

near

l

y

reached

the

crane

o

p

erat

i

on

has

to

sto

p

and

the

vesse

l

needs

to

ba

ll

ast

i

n

a

w

ay

that

the

li

ft

i

n

g

p

rocedure

can

p

roceed

,

w

i

thout

e

x

ceed

i

n

g

the ma

xi

mum

s

p

ec

i

f

i

ed

an

g

l

e of

hee

l

to e

i

ther

s

i

de

.

4

.

2

.

7

B

il

g

es

,

v

o

i

d

s a

nd o

v

e

r

f

l

o

w ta

n

ks

T

he

vesse

l

b

il

g

e

,

overf

l

o

w

tan

k

s

and

vo

i

ds

s

p

aces

shall

be

k

e

p

t

p

um

p

ed

to

a m

i

n

i

mum

content

at

a

ll

t

i

mes

cons

i

stent

w

i

th

p

o

ll

ut

i

on

p

revent

i

on

re

q

u

i

rements

.

4

.

2

.

8 D

e

c

k

c

a

rgo

– e

ff

e

c

t

o

f

e

n

t

r

a

pp

e

d

wate

r

W

hen

p

i

p

es

are

carr

i

ed

on

dec

k (

or

other

car

g

oes

li

ab

l

e

to

p

rov

i

de

a

tem

p

orary

tra

p

for

w

ater

),

a

vo

l

ume

of

entra

pp

ed

w

ater

shall

be assumed

.

V

ers

i

on

SF(BOS-

P

RD-0

7

.900

6

01-

ver

.0

4

). O

r

i

g

i

na

l

date:

22

/

0

6

/

2012.

V

ers

i

on

date:

3

1

/

12

/

201

5

.

V

a

li

d

vers

i

on

on

l

y

on Q

M

S

s

i

te

.

U

ncontro

ll

ed

document

w

hen

p

r

i

nted

.

P

rocedure

p

re

p

ared by:

BOS

Head

of

O

p

erat

i

ons

.

App

roved

by:

BOS

Head

of

O

p

erat

i

ons

.

V

a

li

dated by:

BOS

Qua

li

ty

R

e

p

resentat

i

ve

.

9

/

1

3

343