625/ 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
C) - Catenary and towline tension curves
T
he
fo
ll
ow
i
ng
app
li
es
to
catenary and
tow
li
ne
tens
i
on
curves:
x
E
x
erc
i
se great
caut
i
on and
respect
the
dynam
i
c
forces when
tow
i
ng
i
n
adverse weather
.
x
T
he
l
ength
of
tow
li
ne
pa
i
d
out may
be
cr
i
t
i
ca
l
to
the
tens
i
on
the
tow
li
ne
can
hand
l
e
.
E
x
erc
i
se
great
caut
i
on when waves
come
i
n astern
.
x
T
he
l
ength
of
the
tow
li
ne
i
s
cr
i
t
i
ca
l
to
i
ts
e
l
ast
i
c
i
ty
and
ab
ili
ty
to
absorb
dynam
i
c
forces
. T
he
l
onger
i
s
the
tow
li
ne
,
the
greater
i
ts
capac
i
ty
to
hand
l
e
dynam
i
c
tens
i
on
. O
f
course
,
water
depth
and
other
water
-
re
l
ated
c
i
rcumstances w
ill
a
l
so determ
i
ne
the
l
ength
of
the
tow
.
x
F
or
l
onger
ocean
-
go
i
ng
tows
the
l
ength
of
the
tow
li
ne
should
be
as
l
ong
as
poss
i
b
l
e
, i.
e
.
appro
xi
mate
l
y
1200 -1
3
00
metres
or
l
onger
.
x
Ca
l
cu
l
at
i
on mode
l
s
(
w
i
th
spread
sheet
and
tab
l
es
)
should
be
g
i
ven w
i
th
catenary
curves
to
vesse
l
s
and
i
nsta
ll
at
i
on
.
x
S
amp
l
e of
catenary
ca
l
cu
l
at
i
on
Vers
i
on
SF(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
49
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
.
625