621/ 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
The wire should preferably be hauled around the two inner towing pins to avoid damage to the wire.
4.2.1.20 Pipe Lay Barges
Most
p
i
pe
l
ay
i
ng
i
s
now
done
by
D
P
sh
i
ps
,
mov
i
ng
a
l
ong
on
thrusters
,
but
there
are
st
ill
some
e
l
der
l
y
p
i
pe
l
ayers
around
that
use
anchors
. T
hese
often
use
a
set
of
12
anchors
, 1
5
tonnes AC
14,
w
i
th w
i
res
,
norma
ll
y
70
mm
from
the w
i
nches
. F
rom
the
anchor
a
s
i
ng
l
e
pennant w
i
re
i
s
brought
through
a
buoy
to
a
hard
eye
.
Sli
ngs
are
attached
to
the
buoy
and
the
hard
eye
,
and
these
anchors
are moved
a
l
ong
,
under
the
d
i
rect
i
on
of
the anchor
superv
i
sor
,
for
the barge
to move and
k
eep
tens
i
on on
.
T
o
li
ft
the
anchor
catch
the
buoy
s
li
ng
and
dec
k
the
buoy
,
then
heave
on
the w
i
re
through
the
buoy
. O
nce
the
anchor
i
s
5
0
metres
off
bottom
the
superv
i
sor w
ill
d
i
rect
the
vesse
l
to
the
ne
x
t
drop
po
i
nt
for
the
anchor
,
shown on
the nav
i
gat
i
on
screen prov
i
ded
.
T
o
re
l
ease
the
anchor
pay
out
unt
il
on
the
seabed
,
d
i
sconnect
the
pennant
w
i
re
,
wh
i
ch
may
have
been
connected
to
the w
i
nch w
i
re w
i
th
a
s
li
p
hoo
k,
and
l
eave
the
buoy
free
. W
hen mov
i
ng
ahead
the
buoy
runs
over
the
stern
.
T
o
prevent
the w
i
re
dragg
i
ng
s
i
deways
,
the
p
i
pe
-l
ay
barge may
hau
l i
n most
of
the w
i
re
and
then
get
i
t
re
-
run
. B
arge
w
i
nches
are
very
strong
,
and
be
i
ng
pu
ll
ed
astern
at
5
k
nots
i
s
norma
l,
before
turn
i
ng
and
head
i
ng
for
the
new drop
po
i
nt
.
T
he
pennant
w
i
res
are
norma
ll
y
cut
at
the
start
of
the
season
for
the
deepest
water
e
x
pected
,
p
l
us
a
marg
i
n
,
so
i
n
shall
ow water
a
l
ot of
s
l
ac
k
w
i
re w
i
nd
i
ng
i
s
i
nvo
l
ved
.
4.2.1.21 Jack up rig
W
hen wor
ki
ng w
i
th
j
ac
k
up
r
i
gs
i
t
i
s
norma
l
to
attach
a
tug
to
the
q
uarter
of
the
r
i
g
for
pos
i
t
i
on
i
ng
.
A
6
0
m
pennant
i
s
pre
r
i
gged
and
the end
passed
by
crane
,
but heav
i
ng
li
nes
and
tuggers
are
st
ill
somet
i
mes
used
.
After
connect
i
ng
, l
et out
200
metres
of w
i
re
to
a
ll
ow
for
fast
turn
i
ng
i
f
needed
.
T
he
tow
Master
pos
i
t
i
ons
the
r
i
g w
i
th
i
nstruct
i
ons
to
the
two
tugs
,
dropp
i
ng
,
and
ra
i
s
i
ng
the
r
i
g
l
egs
on
the
seabed
,
unt
il
r
i
g
i
s
p
i
nned
and
li
fted
c
l
ear
of
the water
.
I
f
the
r
i
g
i
s
go
i
ng
to
be
wor
ki
ng
ne
x
t
to
,
or
over
,
a
p
l
atform
,
f
i
na
l
pos
i
t
i
on
i
ng
ta
k
es
p
l
ace
w
i
th
the
he
l
p
of
sma
ll
anchors
and w
i
res
.
Vers
i
on
SF
(
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
45
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
.
621