411-Mooring Operations / 748
Moorin
g Op
erations
BOS-PRD-07.900607
Some marks
should
be tapped on each line to easily check if one of the winches is paying out unexpectedly.
For the retrieval of anchors at the end of the operation, the SMV first moves to the safety position. Then, the
AH vessel retrieves anchors and keep them on her deck with related buoys and pennants.
4
.
7
.
2 C
al
cu
lation
Calculation
shall
be made to know the theoretical holding power of the line.
Calculation
shall
be also made to have a catenary model for all lines.
Calculation for Storm Keeping Capability
shall
be made.
Calculation models (with spreadsheet and tables)
should
be given with catenary curves to vessels and
installation.
The Bourbon Excel Model (filling system)
shall
be used to operate the calculations.
4
.
7
.
3 P
arti
cu
lar sit
u
ation
Moorin
g
line
p
assin
g b
et
w
een t
w
o installations
In this situation the use of a work boat or surfer
shall
be necessary to send the mooring line to the AHTS. To
perform this operation, a long messenger
shall
be used in order to avoid the weight of the mooring line stop
the work boat’s progress.
The use of work boats or surfer in all sea and swell conditions
shall
be carefully assessed by the
Master
/
Off
i
c
er o
f
the Wat
c
h
(OO
W
)
and adequate pre-job planning
shall
be conducted prior to use,
including completion of the applicable checklist pre-launch if applicable.
Surfer transferring messenger between two installations.
Version 04. Original date: 22/06/2012. Version date: 31/12/2014. Valid version only on QMS site. Uncontrolled document when printed.
Procedure prepared by: BOS Operations Department Project Coordinator. Approved by: Head of Operations. Validated by: BOS Quality Representative
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