478/ Dynamic Positioning Operations / 992
Dy
na
m
ic
P
ositionin
g
O
p
erations
BOS-
P
RD-2
6
.900
6
0
6
4.6.5.1 DP Capability Plots
x
Vesse
l’
s
Master
shall
ensure
that
D
P
Capab
ili
ty p
l
ots
are ava
il
ab
l
e on
board
.
x
Capab
ili
ty
p
l
ots
shall
be pr
i
nted
and
arch
i
ved
i
n
appropr
i
ate
b
i
nder
as
per
BOS S
M
S
Vesse
l Fili
n
g
S
ystem
.
T
he p
l
ots
shall
i
nc
l
ude at
l
east
the
fo
ll
ow
i
n
g
scenar
i
o at
current
speeds
of
0,
1
and
2 k
nots
:
x
F
u
ll
y
i
ntact
power
g
enerat
i
on and
thrusters
(
for
any approved
conf
i
g
urat
i
on
documented
i
n
the
D
P
F
MEA
);
x
L
oss
of most effect
i
ve
thruster
(
s
);
x
F
o
ll
ow
i
n
g
the
W
orst Case
F
a
il
ure
D
es
i
g
n
I
ntent
(W
C
FDI).
O
p
erations Mana
g
ers
shall
ma
k
e
sure
that
D
P
capab
ili
ty p
l
ots
are
reca
l
cu
l
ated
, i
f
re
q
u
i
red
,
to
:
x
T
a
k
e
i
nto account
chan
g
es
i
n
vesse
l
thrust
,
w
i
nd or
dra
g
coeff
i
c
i
ents
;
x
Ensure
the
p
l
ots
are
su
i
tab
l
e
for
the env
i
ronmenta
l
cond
i
t
i
ons where
the
D
P
operat
i
ons
are
to
ta
k
e
p
l
ace
;
x
R
ef
l
ect
the
re
q
u
i
rements
of
the
contracted wor
k
scope
(
e.g.
e
x
terna
l l
oads
affect
i
n
g
the
vesse
l);
x
T
o address
operat
i
ona
l
constra
i
nts
i
mposed by
the act
i
v
i
ty
(
reference
i
s
be
i
n
g
made
to CAM
, T
AM
and A
SOG).
x
T
he p
l
ots
should
be
ca
l
cu
l
ated at
1
00%
thrust
i
n
order
to have
p
l
ots
to
compare
the
vesse
l
s
’
stat
i
on
k
eep
i
n
g
performance
to
the
performance of
other
vesse
l
s
compet
i
n
g
for
bus
i
ness
and
at
80%
thrust
i
n order
to
have
p
l
ots w
i
th a more
rea
li
st
i
c
20%
mar
g
i
n
l
eft for
compensat
i
on of
dynam
i
c
var
i
at
i
ons
for
use on board
(
“
Amer
i
can
P
etro
l
eum
I
nst
i
tute
R
ecommended
P
ract
i
ce
2SK”). W
here
20% i
s
found
to be
too
conservat
i
ve
,
the
capab
ili
ty ana
l
ys
i
s
should
be
comp
l
emented w
i
th
a
dynam
i
c
capab
ili
ty
ana
l
ys
i
s
.
T
he most
su
i
tab
l
e
type
of
p
l
ot
shall
be used
to
descr
i
be
the
li
m
i
ts
of
operat
i
ons
of
the
vesse
l
:
x
T
hrust ut
ili
z
at
i
on enve
l
opes
;
x
T
hrust
rosettes
;
x
D
P
capab
ili
ty p
l
ots
.
Masters
shall
use
D
P
capab
ili
ty
stud
i
es
(
hard
copy
D
P
capab
ili
ty p
l
ots
or
on
-li
ne
D
P
capab
ili
ty
ana
l
ys
i
s
)
for
p
l
ann
i
n
g
D
P
operat
i
ons
:
the
stud
i
es
shall
be used
to
determ
i
ne
the weather
operat
i
ona
l
w
i
ndow
the
vesse
l
should
be ab
l
e
to ma
i
nta
i
n
i
ts
pos
i
t
i
on and head
i
n
g
,
typ
i
ca
ll
y a
l
so after
a
s
i
n
g
l
e
fa
il
ure
for CAM
conf
i
g
urat
i
ons
and CAM
R
C
conf
i
g
urat
i
ons
4.6.5.2 DP footprint plots
x
D
P
O
shall
use
BOS D
P
footpr
i
nt
p
l
ots
form
to perform
these
tr
i
a
l
s
every
4
wee
k
s ma
xi
mum
.
x
D
P
O
shall
test
the
fo
ll
ow
i
n
g
s
i
tuat
i
on
:
x
S
teady pos
i
t
i
on w
i
th
a
ll
thrusters
se
l
ected
and
a
ll
sensors
se
l
ected
.
x
36
0
rounds w
i
th
a
ll
thrusters
se
l
ected and
a
ll
sensors
se
l
ected
.
x
S
teady pos
i
t
i
on
i
n
w
orst-case
f
ail
u
re
s
i
tuat
i
on
.
x
D
r
i
ft
test
.
x
BOS
foot pr
i
nt
p
l
ots
b
l
an
k
forms
are
ava
il
ab
l
e
i
n
BOS Vessel Filing System
and
appropr
i
ate
b
i
nder
referr
i
n
g
to
113
A
- D
P
Manua
l. I
n
add
i
t
i
on
, BOS
foot pr
i
nt p
l
ots
shall
be
ava
il
ab
l
e
i
n
T
as
k
Ass
i
stant
.
Vers
i
on
SF (BOS-
P
RD-0
7
0
1
.000
6
-
ver
.
C
R).O
r
i
g
i
na
l D
ate
:
31
/
1
2/20
15
.
Vers
i
on
D
ate
:
N/
A
.
Va
li
d
vers
i
on on
l
y
on
Q
M
S
s
i
te
.
Uncontro
ll
ed
document when
pr
i
nted
.
P
a
g
e
3
2
of
44
P
rocedure prepared by
:
BOS
Head
of
O
perat
i
ons
.
Approved
by
:
BOS
Head
of
O
perat
i
ons
.
Va
li
dated by
:
BOS
Q
ua
li
ty
R
epresentat
i
ve
.
478