582/ Anchor Handling and Towing Operations Procedure / 992
A
nc
h
or
H
andlin
g
and To
w
in
g
O
p
erations
P
rocedure
BOS-
P
RD-2
6
.900
6
14
4
D
escri
p
tion
4.1 AH & T Operations description
4
.
1
.
1
S
ta
b
ilit
y
S
tab
ili
ty
of
vesse
l
should
be
chec
k
ed
pr
i
or
start
i
ng
any
anchor
hand
li
ng
and
tow
i
ng
operat
i
ons
. I
n
add
i
t
i
on
to
sa
ili
ng
cond
i
t
i
on
,
stab
ili
ty
ca
l
cu
l
at
i
ons
shall
cons
i
der
worst
-
case
scenar
i
os
.
Pr
i
ntouts
of
these
cond
i
t
i
ons
are
to
be
d
i
sp
l
ayed
throughout
the
operat
i
on
and
rev
i
ewed
as
soon
as
there
i
s
any
event
,
wh
i
ch may
change
the
vesse
l’
s
cond
i
t
i
on
.
A
n
y
criteria in t
h
e a
pp
roved
S
ta
b
ilit
y
Booklet
shall
b
e ad
h
ered to.
Pr
i
or
to
sa
ili
ng
,
a document
shall
be
d
i
sp
l
ayed on
the
br
i
dge
,
v
i
s
i
b
l
e and
ava
il
ab
l
e
to a
ll
dec
k
off
i
cers
on
duty
. T
h
i
s
document
shall
show
the
acceptab
l
e
vert
i
ca
l
and
hor
i
zonta
l
transverse
force/tens
i
ons
to
wh
i
ch
the
vesse
l
should
be
e
x
posed
, i
nc
l
ud
i
ng
a
s
k
etch
of
the
GZ
curve
and
a
tab
l
e
of
the
tens
i
on/forces
that
prov
i
de
the ma
xi
mum
acceptab
l
e
hee
li
ng moment
.
A) Calculations shall show the maximum acceptable tension in wire/chain, including
transverse force that can be accepted in order for the vessel’s maximum heeling to be
limited by one of the following angles:
a) Heeling angle equivalent to a GZ value equal to 50% of maximum GZ;
b) The angle of flooding of the work deck (the angle which results in water on deck when the deck
is flat;
c) 15 degrees.
T
he
ca
l
cu
l
at
i
on
shall
then
be made
to
show
the ma
xi
mum
force
from
the w
i
re/cha
i
n
,
act
i
ng
down
at
the
stern
ro
ll
er
and
transverse
l
y
to
the
outer
p
i
ns
,
wh
i
ch
wou
l
d
be
acceptab
l
e
w
i
thout
ta
ki
ng
the
vesse
l
beyond
the
ang
l
es
stated
above
.
T
he
document
to
be
v
i
s
i
b
l
e
and
ava
il
ab
l
e
shall
a
l
so
show
the ma
xi
mum
force
i
n
the
w
i
re/cha
i
n
as
we
ll
as
the
po
i
nt
where
the
l
atera
l
force
i
s
assumed
to
be
app
li
ed
(
tow
i
ng
p
i
ns/stern
ro
ll
er
). T
he ma
xi
mum
vert
i
ca
l
pu
ll
on
the w
i
re/cha
i
n
shall
not
be
such
as
to
e
x
ceed
those
li
m
i
ts
g
i
ven
above
,
or
to
e
x
ceed
the
S
afe
W
or
ki
ng
L
oad
(SWL)
of
the
ro
ll
er
.
I
f
deep
-
water wor
k i
s
p
l
anned
,
we
i
ght
on
the
stern
ro
ll
er
can
be
hundreds
of
tons
,
wh
i
ch w
ill
be
app
li
ed
at
a
d
i
stance
off
centre
li
ne
accord
i
ng
to
the
set
-
up
of
the
tow
i
ng
p
i
ns
. T
h
i
s w
ill
add
to
li
st
i
ng moments
and
stern
tr
i
m
. T
h
i
s
type
of
vesse
l
usua
ll
y
suffers
reduct
i
on
of
stab
ili
ty
and
the
dec
k
edge
i
s
i
mmersed
ear
li
er
as
the
stern
tr
i
m
i
ncreases
.
B
efore
any
ba
ll
ast
i
ng
operat
i
on
i
s
carr
i
ed
out
the
operator
should
be
aware
of
the
i
mmense
effect
on
stab
ili
ty
of
hav
i
ng
any
tan
k
s
l
ac
k,
part
i
cu
l
ar
l
y
transverse
ro
ll
reduct
i
on
tan
k
s
.
Cons
i
derat
i
on
shall
be
g
i
ven
to
the ma
xi
mum
li
st
i
ng/hee
li
ng
ang
l
e
,
wh
i
ch wou
l
d be
acceptab
l
e
dur
i
ng
the
operat
i
on
.
T
o
preserve
stab
ili
ty
by
reduc
i
ng
the
r
i
s
k
of
f
l
ood
i
ng
,
a
ll
watert
i
ght
doors
,
wh
i
ch
open
onto
the
ma
i
n
dec
k
and
g
i
ve
access
to
under
dec
k
spaces
,
shall
be
k
ept
c
l
osed
dur
i
ng Anchor
Hand
li
ng
and
T
ow
i
ng
(
AH
T)
operat
i
ons
.
A
ll
such
doors
shall
be
c
l
ear
l
y mar
k
ed accord
i
ng
l
y
.
Vers
i
on
S
F
(BOS-
P
RD-0
7
01.000
5
-
ver
.
C
R). O
r
i
g
i
na
l D
ate
:
3
1
/
12
/
201
5
.
Vers
i
on
D
ate
: N
/A
.
Va
li
d
vers
i
on
on
l
y on QM
S
s
i
te
.
Page
6
of
60
Procedure prepared by
: BOS
Head
of
O
perat
i
ons
.
Approved
by
: BOS
Head
of
O
perat
i
ons
.
Va
li
dated by
: BOS
Qua
li
ty
R
epresentat
i
ve
.
582