616/ 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
depth
,
and
cross
the
bear
i
ng
of
the
cha
i
n
by
10
degrees
,
mov
i
ng
at
about
2 k
nots
. I
f
the
cha
i
n
i
s
l
ead
i
ng
090,
cross
i
t
at
100
degrees
.
N
orma
ll
y
,
however
,
the
cha
i
n
w
ill
be
hang
i
ng
near
l
y
stra
i
ght
down
from
the
r
i
gs
fa
i
r
l
ead
,
and
the
stern
of
the
vesse
l
has
to
be
ta
k
en
to
w
i
th
i
n
3
0
metres
before
s
l
ac
ki
ng
out
¾
of
water
depth
,
and
heav
i
ng
i
n
.
S
evera
l
tr
i
es may be needed before a
connect
i
on
i
s made
.
W
hen
the
cha
i
n/w
i
re
has
been
caught
by
the
J
-
Hoo
k, i
t
i
s
v
i
ta
l
to
k
eep
constant
tens
i
on
to
avo
i
d
the
J
-
Hoo
k
to
s
li
p
.
O
nce
connected
,
pay
out
s
l
ow
l
y
wh
il
e
mov
i
ng
out
on
the
li
ne
of
the
cha
i
n
,
unt
il
water
depth
of
l
ess
10
metres
i
s
reached
. I
f
there
i
s
an
embedded
anchor
at
the
end
of
the
cha
i
n
,
when w
i
th
i
n
100
metres
or
so
of
the
anchor
s
l
ac
k
out
to
1.4
t
i
mes water
depth
,
and
recover
anchor
as
norma
l,
but
dec
ki
ng
the
anchor
, i
f
i
n
deeper water
, i
s
best
l
eft unt
il
the
r
i
g
has
recovered most of
the
cha
i
n
,
and
thus
l
oads
are
reduced
.
O
ften
the
(S
tevpr
i
s
)
anchor
comes
up
on
i
ts
s
i
de
,
and
a
l
ot
of
cha
i
n
hang
i
ng
down
can
put
a
severe
bend
i
ng
force on
th
i
s
.
W
hen the
J
-
Hoo
k i
s
used
for
recover
the
anchor
, i
t
w
ill
be
the
same
procedure
as
i
t
i
s
for
chas
i
ng
w
i
th
chaser
co
ll
ar
,
but more
attent
i
on
w
ill
be
re
q
u
i
red
dur
i
ng
the
operat
i
on
. T
o
dec
k
the
anchor
us
i
ng
J
-
Hoo
k
can be more d
i
ff
i
cu
l
t and operat
i
on
need
to
be
proper
l
y
r
i
s
k
assessed
.
A
var
i
at
i
on
on
the
J
-
hoo
k i
s
the
l
oc
ki
ng
hoo
k. T
h
i
s
has
a
bu
il
t
up
sect
i
on
on
the
hoo
k,
such
that
the
cha
i
n
i
s
free
to
run
one
way
,
but
l
oc
k
s the
other
.
Used
for
recover
i
ng
cha
i
n/rope
comb
i
nat
i
ons
where
the
hoo
k
aga
i
nst
the
rope
i
s
to be avo
i
ded
.
I
ts
effect
i
veness
i
s
var
i
ab
l
e
,
and
norma
ll
y
re
q
u
i
res
a
s
l
ac
k
cha
i
n
.
4.2.1.17 Deep Water Operations (Tandem/Joint Towing Operations)
R
ecent
l
y
,
r
i
gs
are mov
i
ng
i
nto much
deeper
water
,
and
the we
i
ghts
i
nvo
l
ved w
i
th
the
anchor
i
ng
are much
h
i
gher
.
A
r
i
g
w
i
th
cha
i
n/w
i
re
comb
i
nat
i
on moor
i
ng
should be
used
;
gear
i
s
typ
i
ca
ll
y
1900
metres
of
9
6mm
w
i
re
, 9
5
0
metres
of
8
3mm
cha
i
n
,
and
an
e
x
tens
i
on
of
9
5
0
metres
of
77
mm
cha
i
n
,
then
an
18
tonnes
anchor
. T
h
i
s
g
i
ves
an
e
q
u
i
pment we
i
ght
of
36
8
tonnes
before
tens
i
on
i
ng
,
sp
li
t
between
the
anchor
hand
l
er
and
the
r
i
g
. T
he
anchor
hand
l
er
ta
k
es
the
anchor
and
chaser
on
dec
k,
pu
ll
s
out
the
8
3mm
cha
i
n
from
the
r
i
g
,
unt
il
the
connect
i
on
to
the w
i
re
i
s
c
l
ear
of
the
fa
i
r
l
ead
,
and
connects
the
77
mm
cha
i
n
e
x
tens
i
on
,
wh
i
ch
i
s
then dep
l
oyed
.
T
andem
operat
i
on
,
p
l
anned
or
not
p
l
anned
shall
be
cons
i
dered
as
a
h
i
gh
-
r
i
s
k
operat
i
on
and
a
new
r
i
s
k
assessment must be performed
.
O
nce
the
anchor
i
s
connected
,
a
second
anchor
hand
l
er
approaches
3
00
metres
astern
and
hoo
k
s
the
cha
i
n w
i
th
a
grapne
l. T
o
g
i
ve
a
better
catenary
the
f
i
rst
anchor
hand
l
er
steams
ahead
at
about
170
tonnes
tens
i
on
.
Vers
i
on
S
F
(BOS-
P
RD-0701.000
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
40
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
.
616