403-Mooring Operations / 748
Moorin
g Op
erations
BOS-PRD-07.900607
When a synthetic mooring rope is turned up on a set of bits, two round turns
shall
be made around the
leading post of a large set of bits or around both posts for smaller circumference posts before starting to
figure of eight the rope.
When a wire rope is turned up on a set of bits, three round turns
shall
be made around the bits before
applying four figure of eight turns. The top layers
shall
be lashed to prevent them jumping off.
The method of turning up wire and ropes as described in 6.5 and 6.6 allows greater control of the rope when
slacking down or transferring to a drum end as it reduces the possibility of a sudden surge as the turns on
the bits are reduced.
When fastening a brake to make a line fast it is often difficult to manually tighten brakes to their maximum
extent when a mooring line has little load on it. People of different physical strength
shall
apply different
forces to the winch brake lever. For this reason the winch brakes
shall
be checked at frequent intervals as
changes in load on the mooring line, due to changes in height of tide or free board, may cause a
redistribution of stresses in the brake band allowing the brake to be applied further.
On ships fitted with hydraulic brakes, the torque setting indicator
shall
be marked with the setting required for
optimum brake application. This figure
shall
be obtainable from the manufacturer’s operation manual.
In order to conform with local regulations, rat-guards
shall
always be placed on all mooring lines.
De
c
k
Off
i
c
ers
shall
, as part of their harbour duties ensure that the rat-guards remain in place.
4
.
2
.
8
T
en
d
in
g
o
f
m
oorin
g
w
h
en alon
g
si
d
e
During the period alongside the moorings
shall
be regularly inspected and tended if required. The manning
required to tend the mooring
shall
be decided by the
Master
. The level of manning required
shall
of course
depend upon the design of the mooring system such as all the lines are on winches, or if some are turned up
on bits and the amount of tending expected throughout the time alongside.
While alongside, the bridge have to be manned at all time, in order to ensure that unpredicted changes in
environmental conditions and traffic movements are monitored and recorded in the
Bridge Logbook
to
prevent the vessels breaking out from her moorings.
4
.
2
.
9 T
h
e
u
n
b
ert
h
in
g
o
p
eration
The
Master
is responsible for ensuring that sufficient personnel are assigned to each mooring station.
Prior to the unberthing of the ship, the
Master
is to discuss with the
Pilot
the procedure for letting go. The
Master
shall
instruct the Officers or other persons responsible for the fore and aft mooring stations. The
instruction
shall
include:
x
Safety precautions to be observed during the operation;
x
The use of any tugs, their position and means of making fast;
x
Sequence of letting lines go;
x
The need to report when the propeller and thrusters are clear.
The un-berthing operation
shall
not commence until all essential bridge and engine room systems have been
checked and reported as satisfactory.
The singling up operation
shall
be carried out in an orderly fashion. Any line brought in
shall
be clear of the
working area before another line is worked.
The person supervising the operation
shall
observe that the lines do not snag any obstructions on the shore
or jetty or present a danger to any small boats in the vicinity.
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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