Bourbon - Offshore - Surf - SMS manual 2016

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Page Background

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

d

i

rect

l

y

shac

kl

ed

to

the

anchor

. T

he

top

end

goes

i

n

i

t

i

a

ll

y

on

to

a

5

tonne

surface

buoy

,

but

these

are

banned

for

l

ong

term

use

,

so

after

the

r

i

g

i

s

tens

i

oned

up

i

n

pos

i

t

i

on

,

the

buoy may

be

removed

,

and

after

a

so

ca

ll

ed

l

ay

down w

i

re

i

s

added

, (

wh

i

ch

i

s

i

n

fact

another

120

m

pennant

),

the w

i

res

are

stretched

out

i

n

a

g

i

ven

d

i

rect

i

on w

i

th

a

sacr

i

f

i

c

i

a

l

strop

i

nserted

. T

h

i

s

,

on

part

i

ng

,

causes

the w

i

res

to

fa

ll

to

the

seabed

i

n

a

fa

i

r

l

y

stra

i

ght

li

ne

.

A

surveyor

records

th

i

s

for

ne

x

t p

i

c

k

up

. W

h

il

e

i

t

i

s

easy

to

j

ust drop

i

t

, i

t m

i

ght be

you who

has

to

grapne

l

for

i

t

at

recovery

.

T

o

retr

i

eve

the

buoy

,

the

vesse

l i

s

bac

k

ed up

,

unt

il

the

stern

i

s

c

l

ose

to

the buoy

.

T

wo

crew members

then

throw

a

l

asso

, (1

3m

x 28

mm

average

)

w

i

th

a

p

i

ece

of

sma

ll

cha

i

n

i

n

the m

i

dd

l

e

,

over

the

buoy

. T

h

i

s

should

go

r

i

ght

over

the

buoy

,

cho

ki

ng

on

the

w

i

re

underneath

when

tens

i

oned

. T

he

buoy

i

s

then

li

fted by pu

lli

ng on

the

attached w

i

nch

and

the w

i

re

i

s

secured

i

n

the w

i

re

stopper

.

A messenger

rope

can a

l

so be

used

to

throw

around

the

buoy

,

and

the

tugger

w

i

nch

i

s

used

to

pu

ll

the

l

asso w

i

re

i

tse

l

f

around

the

buoy

.

A

l

ways

chec

k

vesse

l’

s

pos

i

t

i

on

re

l

at

i

ve

to

the anchor

to

stop

a

sudden

l

oad

com

i

ng on

the w

i

re

.

A

favoured

aspect

i

s

beam

on

to

any

swe

ll,

such

that

the

vesse

l

and

buoy

are

r

i

s

i

ng

and

fa

lli

ng

together

.

Wi

th

the

thrust

ava

il

ab

l

e

th

i

s

i

s

norma

ll

y poss

i

b

l

e

.

F

a

ili

ng

that

, i

n

ca

l

m weather

,

stern

to weather

i

s

f

i

ne

. I

f

i

t

i

s

needed

to

go

near

l

y head

to weather

,

be

carefu

l

of

fa

lli

ng

down

on

to

the

buoy

,

wh

i

ch

causes

the

pennant

w

i

re

to

t

i

ghten

,

and

the

buoy

i

s

pu

ll

ed

i

n

to

the

prope

ll

ers

. B

uoy

catch

i

ng

i

s

the most weather

li

m

i

ted operat

i

on when anchor

hand

li

ng

.

I

f

cranes

for

th

i

s

purpose

are

f

i

tted

,

the

l

asso

i

s

re

l

eased and

fa

ll

s

around

the buoy

.

N

obody

i

n

any

c

i

rcumstances

p

l

ace

themse

l

ves

beh

i

nd

the

buoy before

i

t

i

s

secured

i

n

the w

i

re

stopper

.

D

ec

k

crew d

i

sconnects

the

buoy and

connects

the wor

k

w

i

re

to

the

pendant

.

T

he

sh

i

p

w

i

nch

operator

heave

i

n

the

s

l

ac

k

and

the

dec

k

crew can

remove

the

safety

p

i

n

from

the

w

i

re

stopper by order

from

the off

i

cer

i

n

charge

.

T

he off

i

cer

i

n

charge

i

nforms

the

r

i

g

.

A

l

ways

have a M

OB

boat

ready

to

be

l

aunched when

crew aft

.

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

35

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

.

611