460/ Dynamic Positioning Operations / 992
Dy
na
m
ic
P
ositionin
g
O
p
erations
BOS-
P
RD-2
6
.900
6
0
6
N
OT
E:
O
n
any
D
P C
l
ass
vesse
l
the worst
case
consequence
of
any
sing
l
e
fai
l
ure
in
the
thruster
(
R
C)
system
shall
be
a
fai
l
safe
condition
such
that
the
vesse
l
does
not
l
ose
heading
or
position
.
Acceptabi
l
ity of
fai
l
ure modes
(fai
l
as
set,
or
fai
l
to
z
ero)
shall
depend
upon
the
phi
l
osophy
of measurement
and
contro
l
of
thruster
forces
used
by
the
particu
l
ar
D
P
contro
l
system
.
W
here
there
are
a
l
terations
to
the
critica
l
redundancy
or
there
are
additions
to
non
-
critica
l
redundancy
(software
or
hardware)
subsequent
to
the
issuing
of
the
c
l
ass
-
approved
D
P
F
MEA
study,
MO
C
(
Mana
g
e
m
ent o
f C
han
g
e
)
must be
initiated
by
Technical
Sup
erinten
d
ent
or
vesse
l
superintendent
. S
uch
M
O
C
must
l
ead
to updating
the
D
P
F
MEA,
the associated
D
P
F
MEA
tria
l
s
program
and
the PM
S.
W
hen
such
a
l
terations
and/or modifications
do
not
impact
the
proof
of
comp
l
iance with C
l
ass
requirements,
it
may
not
be
necessary
to
re
-
submit
the
D
P
F
MEA
for C
l
ass
approva
l.
However,
Technical
Sup
erinten
d
ent
shall
:
x
I
nform C
l
ass
of
any a
l
terations
and additions, of
a ma
j
or
a
l
teration
or
addition
;
x
Provide C
l
ass with
the
test
protoco
l
to
verify and
va
l
idate
the a
l
teration or
addition
;
x
O
btain written
consent
on
the
test
protoco
l
and
invite C
l
ass
at
any
testing
for
sign off
;
x
K
eep
records
of
a
l
terations,
additions
and
associated
tests
anne
x
ed
to
the
D
P
F
MEA
or
the
re
l
evant
test program
and ma
k
e
these avai
l
ab
l
e
during
D
P
verification audits
and
tria
l
s
;
x
Ensure
the
D
P
F
MEA
is
reviewed after
any ma
j
or
changes
to
the
D
P
system
and
equipment
during
the
vesse
l’
s
l
ife
cyc
l
e
;
x
Ensure
the
D
P
F
MEA
is
comp
l
ete
l
y
reviewed,
incorporating minor
changes
at
l
east every
five
years
.
T
he
D
P
F
MEA Ana
l
ysis must be
considered a
l
ive document and
he
l
d on board
each
D
P
vesse
l.
O
p
erations
Mana
g
ers
must
ensure
that
the
k
ey
D
P
personne
l
are
fami
l
iar with
the
D
P
F
MEA Ana
l
ysis contents
and
that
fau
l
ts
and
sing
l
e
point
fai
l
ures
addressed
in
the
D
P
F
MEA
are used
to
deve
l
op
ship
-
specific
D
P dri
ll
s
.
O
p
erations Mana
g
ers
must ensure
that
a
D
P
vesse
l
is
operated
in
a
configuration
which
has
been
ana
l
y
z
ed
and
proven
in
its C
l
ass
-
approved
D
P
F
MEA
. T
he
D
P
F
MEA may
need
to
be
reviewed
to
determine
a
l
ternative
system
configurations
and
to
a
ll
ow
these
to
be
used
. O
nce
identified,
the
system
configurations
for
CAM
(Critica
l
Activity mode) must be
documented
in
a
C
l
ass
-
approved
D
P
F
MEA
supp
l
ement
or
in
a
C
l
ass
-
approved
reviewed
version of
the
D
P
F
MEA
.
F
or
more
comp
l
icated
power
systems
and
thruster
configurations
(typica
ll
y found
on
the
BO
U
RBO
N
D
P
vesse
l
s
engaged
in
subsea
services),
a
T
hruster
and
G
enerator
O
perating
S
trategy
(
T
A
GOS
)
must be
inc
l
uded
in
the
document
to
assist
the
k
ey
D
P
personne
l
in
choosing
a
generator/thruster
arrangement which
is
most
suitab
l
e
for
the
prevai
l
ing
environmenta
l
conditions
and
different
equipment
avai
l
abi
l
ities
. T
he
optimum
generator
l
oad,
the
maintenance
of
spinning
reserve
and
l
oad
dependent
start/stop
functions
should
be
addressed
in
the
T
A
GOS.
I
n other
w
or
d
s TAGO
S
shall co
mp
ile the
C
AM an
d C
AMrc strate
gy
.
Master
shall
have
a
T
A
GOS
avai
l
ab
l
e
for
each
activity
the
vesse
l
is
contracted
for
.
C
l
assification
according
to
I
MCA
D
P
sub
-
activities:
x
Accommodation
support
;
x
D
iving
;
x
Heavy
l
ift
;
x
O
ffshore
support
;
x
RO
V
support
;
x
W
e
ll
simu
l
ation
;
L
ast
F
MEA
report
shall
be
archived
in
appropriate
binder
as
per
;SMS vessel filing system
and
is
a
part
of
D
P
vesse
l
fami
l
iari
z
ation
.
F
MEA
proving
tria
l
(s)
are
described
in “IMCA guidelines M 166 “Guidance on Failure Modes & Effects
Analyses (FMEAs)”.
V
ersion
SF
(
BOS-
P
RD-0
7
0
1
.000
6
-
ver
.
C
R
)
.O
rigina
l D
ate:
3
1
/
1
2
/
20
1
5
.
V
ersion
D
ate:
N/A
.
V
a
l
id
version
on
l
y
on
QM
S
site
.
Uncontro
ll
ed
document
when
printed
.
Page
1
4 of
44
Procedure prepared by:
BOS
Head
of
O
perations
.
Approved
by:
BOS
Head
of
O
perations
.
V
a
l
idated by:
BOS
Qua
l
ity
R
epresentative
.
460