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Dy

na

m

ic

P

ositionin

g

O

p

erations

BOS-

P

RD-2

6

.900

6

0

6

4

.

5

.

6 DP

tec

h

nical

d

oc

um

entation an

d

recor

d

in

g

req

u

ire

m

ents

Tec

h

nical

Sup

erinten

d

ent

shall

k

eep

the

D

P

system

fu

ll

y

techn

i

ca

ll

y

documented

and

updated

throughout

the

vesse

l’

s

li

fe

cyc

l

e

.

Up

to

date

“

as

bu

il

t

”

/

”

as

i

s

”

vesse

l-

spec

i

f

i

c

documentat

i

on

,

draw

i

ngs

and

schemat

i

cs

shall

be

read

il

y ava

il

ab

l

e

the

k

ey

D

P

personne

l

on

board at a

ll

t

i

mes

.

T

he

li

st

cons

i

st

i

ng

of

the

documents

re

l

ated

to

the

D

P

system

wh

i

ch

shall

be

ava

il

ab

l

e

on

board

the

vesse

l

can

be

found

i

n

the

Dynamic Positioning Best Practices

. T

he

“

D

P

Contro

l S

ystem

Manufacturer

D

ocumentat

i

on

”

shall

at

l

east

i

nc

l

ude

:

Manua

l

s

,

draw

i

ngs

, i

nterfaces

;

T

est

i

ng

documentat

i

on

:

F

actory

A

cceptance

T

ests

(F

A

T),

H

arbor

A

cceptance

T

ests

(

HA

T)

and

Customer

A

cceptance

T

ests

(

C

A

T).

F

or

a

ll

the ma

i

n

D

P

contro

l

system

components

(

f

i

gure

3

),

the

documentat

i

on

(

typ

i

ca

ll

y

l

ayout

and

s

i

ng

l

e

li

ne

draw

i

ngs

)

should

i

dent

i

fy/spec

i

fy

:

x

T

he

i

r

phys

i

ca

l l

ocat

i

on on

the

vesse

l;

x

T

he

i

r

cab

l

e

routes

;

x

T

he

i

r

power

supp

l

y

redundancy or

the

redundancy group

to wh

i

ch

they be

l

ong

;

x

T

he

cab

l

e

li

st

and

cab

l

e deta

il

s

;

x

S

ystem

I

nput/

O

utput

(I

/

O)

spec

i

f

i

cat

i

on

;

A

s

i

ng

l

e

f

il

e

shall

be

ma

i

nta

i

ned

w

i

th

sensors

and

Pos

i

t

i

on

R

eference

S

ystem

(

P

RS)

or

i

g

i

ns

re

l

at

i

ve

to

a

vesse

l

common

reference

po

i

nt

and

offsets

of

the

antennas

or

sensor

heads

to

the

vesse

l’

s

center

of

grav

i

ty

used

i

n

D

P

(

the

f

il

e

i

s

to

be

comp

l

emented

by

a

Di

mens

i

ona

l

Contro

l S

urvey

R

eport

for

D

P

vesse

l

s

engaged

i

n

subsea

serv

i

ces

).

I

n

add

i

t

i

on

to

D

P

contro

l

system

documentat

i

on

,

Tec

h

nical

Sup

erinten

d

ent

shall

document

the

i

nterfaces

between

the

D

P

contro

l

system

(i

nc

l

ud

i

ng

sensors

and

P

RS),

the

vesse

l’

s

Power Management

S

ystem

and

thruster

R

C

system

and

they

shall

k

eep

record

of

a

ll

ca

li

brat

i

on

chec

k

s

and

test

i

ng

procedures

(F

A

T

/

HA

T

/

C

A

T)

assoc

i

ated w

i

th

these

systems

.

F

au

l

ts

and

fa

il

ures

,

repa

i

rs

,

ma

i

ntenance

and

mod

i

f

i

cat

i

ons

to

the

D

P

contro

l

system

or

any

of

the

sub

systems

i

n

f

i

gure

3

shall

be

sub

j

ect

to

Management of Change – Risk Analysis

anne

x

ed

by

an

Equipment

Change Report

(

when

appropr

i

ate

)

and

be

recorded

i

n

the

PM

S.

A

comprehens

i

ve

overv

i

ew

of

the

D

P

re

li

ab

ili

ty

shall

be

cont

i

nuous

l

y

assessed

v

i

a

the

PM

S

and

made

ava

il

ab

l

e

to

c

li

ents

and

or

surveyors

i

f

re

q

u

i

red

.

4

.

6 Ph

iloso

phy

on

DP

o

p

eration

T

he

safety

of

a

D

P

operat

i

on

i

s

character

i

zed

by

two

k

ey

parameters

:

the

reduct

i

on

of

r

i

s

k

through

a

reduct

i

on

i

n

fau

l

t probab

ili

ty

l

ead

i

ng

to

a

L

oss

of

Pos

i

t

i

on

(LO

P

)

event

and

the

i

mprovement

of

the

t

i

me

needed

to

recover

stat

i

on

-k

eep

i

ng

contro

l

when a

LO

P

event

has

occurred

.

A

s

such

,

the success

of

a

D

P

re

l

ated

operat

i

on

i

s

l

arge

l

y

dependent

on

the

awareness

of

r

i

s

k

and

on

the

q

ua

li

ty of

D

P

procedures

and

D

P Emergency

R

esponse

(

E

R)

p

l

ann

i

ng

.

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

:

3

1/1

2

/

20

15

.

Vers

i

on

D

ate

:

N

/

A

.

Va

li

d

vers

i

on

on

l

y

on

QM

S

s

i

te

.

Uncontro

ll

ed

document

when

pr

i

nted

.

Page

18 of

44

Procedure prepared by

:

BOS

H

ead

of

O

perat

i

ons

.

A

pproved

by

:

BOS

H

ead

of

O

perat

i

ons

.

Va

li

dated by

:

BOS

Qua

li

ty

R

epresentat

i

ve

.

464