459/ Dynamic Positioning Operations / 992
Dy
na
m
ic
P
ositionin
g
O
p
erations
BOS-
P
RD-2
6
.900
6
0
6
4
.
5
.1
DP
class an
d
re
d
u
n
d
anc
y
o
f DP
eq
u
i
pm
ent
D
P
i
s
one
of
the
k
ey
sh
i
p
funct
i
ons
contr
i
but
i
ng
to
the
safety
of
our
O
ffshore
S
upport
V
esse
l
s
(OS
V
)
operat
i
ons:
hav
i
ng
recogn
i
zed
the
use
of
D
P
,
C
l
ass
soc
i
et
i
es
pub
li
sh
vesse
l
type
gener
i
c
re
q
u
i
rements
for
the
c
l
ass
i
f
i
cat
i
on
and
cert
i
f
i
cat
i
on
of
D
P
vesse
l
s
.
BO
U
RBON
fo
ll
ows
I
M
O D
P
system
c
l
ass
i
f
i
cat
i
on
w
i
th
the
correspond
i
ng
D
P
C
l
ass
notat
i
ons
and
the
correspond
i
ng
cr
i
t
i
ca
l
redundancy
re
q
u
i
rements
.
F
or most
BOS
vesse
l
s
,
mere
l
y
ach
i
ev
i
ng
the
des
i
red
vesse
l
type
gener
i
c
D
P C
l
ass
notat
i
on
i
s
not
suff
i
c
i
ent
to meet
the
ob
j
ect
i
ves
of
a
vesse
l’
s
ant
i
c
i
pated
D
P wor
k
scope
,
or
to meet
the
ant
i
c
i
pated
D
P ma
i
ntenance
schedu
l
e
. O
n
OS
V
s
,
typ
i
ca
ll
y
some
des
i
gn
features
of
“non
-
cr
i
t
i
ca
l”
redundancy
beyond
D
P
C
l
ass
re
q
u
i
rements
are
i
ncorporated
i
n
the
D
P
system
software or
hardware
to:
x
F
ac
ili
tate
certa
i
n
D
P operat
i
ons
;
x
Carry out ma
i
ntenance
and/or
ach
i
eve h
i
gher
ava
il
ab
ili
ty
.
I
n
order
to
ma
xi
m
i
ze
h
i
s
capab
ili
ty
to
support
,
the
O
p
erations Mana
g
er
must
ensure
that
he/she
i
s
fu
ll
y
fam
ili
ar w
i
th
the
vesse
l’
s
D
P
redundancy
concept
assoc
i
ated w
i
th
the
vesse
l’
s
D
P C
l
ass
notat
i
on
,
the
bu
il
t
-i
n
features
to
enhance
D
P
support
systems
and
the
enhanced
funct
i
ona
li
ty
,
or
redundancy
i
n
the
D
P
contro
l
system
.
T
he
O
p
erations Mana
g
er/Master
must
ensure
that
the
vesse
l i
s
e
q
u
i
pped
w
i
th
su
i
tab
l
e
D
P
modes
and
features w
i
th
due
cons
i
derat
i
on
to
contract
operat
i
ona
l
re
q
u
i
rements
,
both w
i
th
regard
to
restr
i
ct
i
ons
caused
by
the
act
i
v
i
ty
,
and
performance
cr
i
ter
i
a
re
q
u
i
red
to e
x
ecute
the act
i
v
i
ty
safe
l
y and
successfu
ll
y
.
I
n
order
to
avo
i
d
gett
i
ng
cons
i
derab
l
e
var
i
at
i
ons
i
n
the
(
non
-
cr
i
t
i
ca
l)
redundancy
l
eve
l
s
on
vesse
l
s
des
i
gned
for
s
i
m
il
ar
dut
i
es
and
thereby
l
os
i
ng
the
benef
i
ts
and
advantages
of
bu
il
d
i
ng
i
n
ser
i
es
,
Technical Mana
g
er
must
fo
ll
ow
the
gu
i
dance
on
D
P
system
e
q
u
i
pment
and
vendor
se
l
ect
i
on
e
l
aborated
i
n
the
Dynamic
Positioning Best Practices
when
i
ncreas
i
ng
non
-
cr
i
t
i
ca
l
redundancy
l
eve
l
s
on
any
D
P
vesse
l.
4
.
5
.
2 DP
f
ail
u
res
m
o
d
es an
d
E
ff
ects
A
nal
y
sis
A
ll D
P C
l
ass
ru
l
es
have m
i
n
i
mum
redundancy
re
q
u
i
rements
st
i
pu
l
ated
to ach
i
eve
fau
l
t
to
l
erant
D
P
systems:
conf
i
rmat
i
on of
comp
li
ance w
i
th
these
“cr
i
t
i
ca
l”
redundancy
re
q
u
i
rements
shall
be prov
i
ded
by means
of
F
MEA
. O
ver
i
ts
li
fe a
vesse
l
w
ill
undergo a
number
of
F
MEA
’
s
,
each w
i
th
d
i
fferent
re
q
u
i
rements:
At
vesse
l
des
i
gn
,
the
processes
and
components
undergo a pre
li
m
i
nary
(
des
i
gn
) F
MEA
(
ser
i
es
gener
i
c
);
T
he
vesse
l i
s
brought
i
nto
serv
i
ce
and
the pre
li
m
i
nary
F
MEA
i
s
proofed
(
becomes
vesse
l
spec
i
f
i
c
);
T
hat proofed
F
MEA
i
s
bu
il
t
upon
as
the
vesse
l’
s
ear
l
y
tr
i
a
l
s
and
e
x
per
i
ences
are
i
ntegrated
;
O
n a mature wor
ki
ng
vesse
l,
the
F
MEA
on
l
y needs
to
be updated when ma
j
or
changes
have
ta
k
en p
l
ace
.
Any
D
P
F
MEA
shall
be based on
the
W
orst Case
F
a
il
ure
D
es
i
gn
I
ntent
(W
C
FDI)
of
the
D
P
system
.
Master
must
ensure
that:
F
or
D
P
2
and
D
P3
vesse
l
s
,
a
sh
i
p
-
spec
i
f
i
c C
l
ass
-
approved
D
P
F
MEA ana
l
ys
i
s
i
s
ava
il
ab
l
e and
that
i
t
i
ncorporates
suff
i
c
i
ent bu
il
t
i
n
conf
i
gurat
i
on
f
l
e
xi
b
ili
ty
to
cope w
i
th
e
q
u
i
pment unava
il
ab
ili
ty where
the
des
i
gn
perm
i
ts
;
F
or
D
P1
vesse
l
s
,
a
sh
i
p
-
spec
i
f
i
c C
l
ass
-
approved
F
MEA of
the
thruster
(R
C
)
system
i
s
ava
il
ab
l
e
.
V
ers
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
.
V
ers
i
on
D
ate:
N
/A
.
V
a
li
d
vers
i
on
on
l
y
on
QM
S
s
i
te
.
Uncontro
ll
ed
document
when
pr
i
nted
.
Page
13 of
44
Procedure prepared by:
BOS
H
ead
of
O
perat
i
ons
.
Approved
by:
BOS
H
ead
of
O
perat
i
ons
.
V
a
li
dated by:
BOS
Qua
li
ty
R
epresentat
i
ve
.
459