234-Passage Planning and Manoeuvring / 748
P
assa
g
e
P
lannin
g
and Manoeu
v
rin
g
BOS-PRD-07.900503
Version 04. Original date: 01/06/2012. Version date: 31/12/2014. Valid version only on QMS site. Uncontrolled document when printed.
Procedure prepared by: BOS Head of Operations. Approved by: BOS Head of Operations. Validated by: BOS Quality Representative.
8 / 13
4
.
2
.1
P
or
t
in
f
or
m
a
t
ion
The Port Authority
shall
be notified according to any Standing Port Regulations.
The following information requirements
shall
be established:
x
Port information;
x
Sailing directions;
x
Communication requirements;
x
Weather reports;
x
Tidal information;
x
Depth of water in approaches, channels and at the assigned berth;
x
Any restrictions on draft, trim, speed or entry times;
x
The documents required for inward clearance; these
shall
be completed in good time.
4
.
2
.
2
D
ra
f
t,
t
ri
m
and s
t
a
b
ili
t
y
Using the loading calculator, the
Mas
t
er
shall
ensure that the loaded or ballast condition of the vessel is in
compliance with the vessels
Stability Booklet
and that load line requirements have been complied with.
The
Mas
t
er
shall
ensure that the routine checks required by the Classification Society to verify the software
of the loading calculator have been completed and recorded.
4
.
2
.
3
U
nder keel
c
learan
c
e
The Company has defined
Shall
ow water as 2 m Under Keel Clearance and this
should
be considered as the
MINIMUM water depth for normal operations.
Depending on the operations in question, it may be sometimes required to traverse a channel or operational
area where the water depth is LESS than the minimum stated 2 m requirement.
In such circumstances a FULL appraisal and Risk Assessment
shall
be performed and documented with
permissions obtained from Shore base Operational management prior to performing any operations.
Considerations as to risk factors
shall
include as a minimum the requirements indicated above (see chapter
4.2.1.
“
Port information”
).
4
.
2
.
4
NO-GO A
rea
Coastal and estuarial charts
should
be examined, and all areas where the ship CANNOT go must be
carefully shown by highlighting or cross hatching, care being taken to not obliterate information such as a
navigation mark or a conspicuous object. Areas so marked are to be considered as no-go areas. In waters
where the tidal range may not be very large, no-go areas
shall
include all charted depths of less than the
ship’s draught plus a safety mar
gin. Such areas
shall
vary according to the ship’s draught
and so will not be
necessarily the same for both inward and outward passages. In general the line determining the “no
-
go” will
be not less than draught + 10%, though this will need to be modified according to the prevailing
circumstances. Draught + 10% may be sufficient in areas where the sea is smooth but will require a higher
figure if the ship is liable to pitch, roll or squat.
In confined area waters, where the tidal height may have a large influence, such no-go areas
shall
vary
according the last time of passage. Initially all areas and dangers showing charted depths of less than the
draught plus the safety margin
should
be considered no-go, though such may be subsequently amended
when the actual time of passage is known. Such areas will need to be carefully marked showing the times
and state of tide at which they are safe.
234