341/ Vessel Stability / 992
Vessel Stabilit
y
BOS-
P
RD-2
6
.900
6
01
4
.1.
7
Stabilit
y
s
o
f
twa
r
e l
o
a
d
i
ng
cond
iti
on
test.
T
he
p
ur
p
ose
i
s
to ensure
the o
p
erat
i
ona
l
accuracy of
the
stab
ili
ty
soft
w
are
and
test
records
are ma
i
nta
i
ned
.
D
ur
i
n
g
the
l
oad
i
n
g
test
,
one
of
the
sh
i
p
's
Se
n
i
or
Off
i
c
e
r
s
i
s
to
o
p
erate
the
l
oad
i
n
g
i
nstrument
and
ca
l
cu
l
ate
the
test
cond
i
t
i
ons
.
T
he
resu
l
ts
obta
i
ned
from
the
l
oad
i
n
g
soft
w
are are
to
be
i
dent
i
ca
l
to
those
stated
i
n
the
stab
ili
ty boo
kl
et
.
T
h
i
s
test
shall
be
p
erfomed at
l
east annua
ll
y
.
4
.1.
8
F
r
ee s
u
r
f
a
c
e e
ff
e
c
t
I
f
a
tan
k i
s
com
p
l
ete
l
y
f
ill
ed
w
i
th
liq
u
i
d
,
no movement
i
s
p
oss
i
b
l
e
and
stab
ili
ty
i
s
p
rec
i
se
l
y
the
same
as
i
f
the
tan
k
conta
i
ned
so
li
d mater
i
a
l. W
hen
a
q
uant
i
ty
of
liq
u
i
d
i
s
w
i
thdra
w
n
from
the
tan
k
the
s
i
tuat
i
on
chan
g
es
and
the
stab
ili
ty of
the
sh
i
p
i
s
adverse
l
y affected by
w
hat
i
s
k
no
w
n as
the
free
surface effect
.
T
he
adverse
effect
on
the
stab
ili
ty
i
s referred
to
as
a
l
oss
i
n
metacentr
i
c
he
i
g
ht
(G
M
)
or
a
v
i
rtua
l
r
i
se
i
n
Vert
i
ca
l
Centre of
G
rav
i
ty
(
VC
G).
T
he
free
surface effects
of a
ll
s
l
ac
k
tan
k
s
shall
be
ta
k
en
i
nto account
i
n any
ca
l
cu
l
at
i
ons
.
W
hen
i
t
i
s
i
ntended
to
i
ntroduce
or
d
i
schar
g
e
ba
ll
ast
w
ater
dur
i
n
g
a
voya
g
e
the
Maste
r
shall
p
r
i
or
to
de
p
arture ensure
that
the
re
q
u
i
red
stab
ili
ty
cr
i
ter
i
a
i
s ma
i
nta
i
ned at
a
ll
t
i
mes
due
to
l
oss
of
stab
ili
ty by
p
art
i
a
ll
y
f
ill
ed
tan
k
s
.
T
he
free
surface
shall
be
k
e
p
t
to
a m
i
n
i
mum
; i
f
p
oss
i
b
l
e
on
l
y
one
tan
k
of
each
ki
nd
of
liq
u
i
d
shall
have
a
free
surface
. T
he m
i
n
i
mum
G
M
shall
be ma
i
nta
i
ned
as
s
p
ec
i
f
i
ed
i
n
the
Stability Booklet
.
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
shall
be
noted
that
the
tan
k
s
have
a
com
p
l
ete
free
surface
as
soon
as
ba
ll
ast
i
n
g
commences
and
the
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
F
ree
surface
va
l
ues
for
d
i
fferent
l
eve
l
s
can be
found
i
n
the
tan
k
s
ca
p
ac
i
ty
tab
l
es
.
4
.1.
9
F
r
ee s
u
r
f
a
c
e i
n
te
r
a
c
ti
on
s
on
stabilit
y
T
he ma
xi
mum
free
surface moment
of
each
tan
k
shall
be
used
w
hen
they
are
not
fu
ll (
p
ressed
-
u
p
),
or
are
not
em
p
ty
(
str
i
pp
ed
dry
),
throu
g
hout
a
g
i
ven
voya
g
e
. T
he
i
nf
l
uence
of
tr
i
m
i
s
usua
ll
y
no
t
ta
k
en
i
nto
account
w
hen
hand
ca
l
cu
l
at
i
n
g
the
free
surface moments
.
M
anua
l
ca
l
cu
l
at
i
ons
are conservat
i
ve
because ma
xi
mum
free
surface
correct
i
on
i
s
used
,
w
hereas
soft
w
are
ca
l
cu
l
ates
rea
l
free
surface effect
.
4
.1.1
0
Gu
a
rd
i
ng
a
g
ai
n
st a
nd pr
e
v
e
n
ti
ng
f
r
ee s
u
r
f
a
c
e e
ff
e
c
t
T
o
g
uard
a
g
a
i
nst
and
p
revent
free
surface
effect
the
number
of
p
art
i
a
ll
y
f
ill
ed
tan
k
s
shall
be
k
e
p
t
to
a
m
i
n
i
mum
. T
an
k
s
that
are
e
i
ther
com
p
l
ete
l
y
fu
ll
or
com
p
l
ete
l
y
em
p
ty
do
not
have
a
free
surface
effect
and
therefore do
not
reduce
the
vesse
l’
s metacentr
i
c
he
i
g
ht
(G
M
).
A
nt
i-
ro
lli
n
g
tan
k
s
have
a
free
surface
effect
,
w
h
i
ch decreases
the
vesse
l’
s
metacentr
i
c
he
i
g
ht
(G
M
). T
hey
should
,
therefore
,
a
l
w
ays
be em
p
t
i
ed
w
hen
the metacentr
i
c
he
i
g
ht
i
s
sma
ll.
F
ree
surface
effects
are
not
on
l
y
caused
by
p
art
i
a
ll
y
-
f
ill
ed
tan
k
s
. T
hey
can
,
for
e
x
am
p
l
e
,
a
l
so
be
caused
by
accumu
l
ated
w
ater
on
dec
k. T
o
enab
l
e the
w
ater
to
run
off
q
u
i
c
kl
y
,
a
vesse
l
shall
have
ade
q
uate
free
i
n
g
p
orts
. W
ater
shall
f
l
o
w
eas
il
y
to
the
free
i
n
g
p
orts
w
h
i
ch
shall
a
l
w
ays
be
c
l
ear
.
W
hen
l
oad
i
n
g
dec
k
car
g
oes
,
care
shall
be
ta
k
en
to
avo
i
d
any
obstruct
i
on
of
the
free
i
n
g
p
orts
or
areas
necessary
for
the
dra
i
na
g
e
of
p
i
p
e
sto
w
a
g
e
p
os
i
t
i
ons
.
Vers
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.
Vers
i
on
date
:
3
1/12/201
5
.
Va
li
d
vers
i
on
on
l
y
on Q
M
S
s
i
te
.
Uncontro
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
.
Va
li
dated by
: BOS
Qua
li
ty
R
e
p
resentat
i
ve
.
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