(1)
Length. The length (L) shall
be taken as 96 per cent of the total length on a waterline at 85 per
cent of the least moulded depth measured from the top of the keel,
or as the length from the fore side of the stem to the axis of the
rudder stock on that waterline, if that be greater. In ships designed
with a rake of keel the waterline on which this length is measured
shall be parallel to the designed waterline.
(2)
Perpendiculars. The forward and
after perpendiculars shall be taken at the forward and after ends
of the length (L). The forward perpendicular shall coincide with the
foreside of the stem on the waterline on which the length is measured.
(3)
Amidships. Amidships is at the
middle of the length (L).
(4)
Breadth. Unless expressly provided
otherwise, the breadth (B) is the maximum breadth of the ship, measured
amidships to the moulded line of the frame in a ship with a metal
shell and to the outer surface of the hull in a ship with a shell
of any other material.
(5)
Moulded Depth
-
(a) The moulded depth is the vertical distance
measured from the top of the keel to the top of the freeboard deck
beam at side. In wood and composite ships the distance is measured
from the lower edge of the keel rabbet. Where the form at the lower
part of the midship section is of a hollow character, or where thick
garboards are fitted, the distance is measured from the point where
the line of the flat of the bottom continued inwards cuts the side
of the keel.
-
(b) In ships having rounded gunwales, the moulded
depth shall be measured to the point of intersection of the moulded
lines of deck and sides the lines extending as though the gunwale
were of angular design.
-
(c) Where the freeboard deck is stepped and the
raised part of the deck extends over the point at which the moulded
depth is to be determined, the moulded depth shall be measured to
a line of reference extending from the lower part of the deck along
a line parallel with the raised part.
(6)
Depth for Freeboard (D)
-
(a) The depth for freeboard (D) is the moulded
depth amidships, plus the thickness of the freeboard deck stringer
plate, where fitted, plus
if the exposed freeboard deck is sheathed,
- where
T |
= |
is the mean thickness of the exposed
sheathing clear of deck openings, and |
S |
= |
is the total length of superstructures
as defined in sub-paragraph (10) (d) of this Regulation. |
-
(b) The depth for freeboard (D) in a ship having
a rounded gunwale with a radius greater than 4 per cent of the breadth
(B) or having topsides of unusual form is the depth for freeboard
of a ship having a midship section with vertical topsides and with
the same round of beam and area of topside section equal to that provided
by the actual midship section.
(7)
Block Coefficient. The block
coefficient (Cb) is given by:
where
∇ |
= |
is the volume of the moulded
displacement of the ship, excluding bossing, in a ship with a metal
shell, and is the volume of displacement to the outer surface of the
hull in a ship with a shell of any other material, both taken at a
moulded draught of d1; and where
|
d1
|
= |
is 85 per cent of the
least moulded depth. |
(8)
Freeboard. The freeboard assigned
is the distance measured vertically downwards amidships from the upper
edge of the deck line to the upper edge of the related load line.
(9)
Freeboard Deck. The freeboard
deck is normally the uppermost complete deck exposed to weather and
sea, which has permanent means of closing all openings in the weather
part thereof, and below which all openings in the sides of the ship
are fitted with permanent means of watertight closing. In a ship having
a discontinuous freeboard deck, the lowest line of the exposed deck
and the continuation of that line parallel to the upper part of the
deck is taken as the freeboard deck. At the option of the owner and
subject to the approval of the Administration, a lower deck may be
designated as the freeboard deck provided it is a complete and permanent
deck continuous in a fore and aft direction at least between the machinery
space and peak bulkheads and continuous athwartships. When this lower
deck is stepped the lowest line of the deck and the continuation of
that line parallel to the upper part of the deck is taken as the freeboard
deck. When a lower deck is designated as the freeboard deck, that
part of the hull which extends above the freeboard deck is treated
as a superstructure so far as concerns the application of the conditions
of assignment and the calculation of freeboard. It is from this deck
that the freeboard is calculated.
(10)
Superstructure
-
(a) A superstructure is a decked structure on
the freeboard deck, extending from side to side of the ship or with
the side plating not being inboard of the shell plating more than
4 per cent of the breadth (B). A raised quarter deck is regarded as
a superstructure.
-
(b) An enclosed superstructure is a superstructure
with:
-
(i) enclosing bulkheads of efficient construction;
-
(ii) access openings, if any, in these bulkheads
fitted with doors complying with the requirements of Regulation 12;
-
(iii) all other openings in sides or ends of the
superstructure fitted with efficient weathertight means of closing.
A bridge or poop shall not be regarded as enclosed unless
access is provided for the crew to reach machinery and other working
spaces inside these superstructures by alternative means which are
available at all times when bulkhead openings are closed.
-
(c) The height of a superstructure is the least
vertical height measured at side from the top of the superstructure
deck beams to the top of the freeboard deck beams.
-
(d) The length of a superstructure (S) is the
mean length of the part of the superstructure which lies within the
length (L).
(11)
Flush Deck Ship. A flush deck
ship is one which has no superstructure on the freeboard deck.
(12)
Weathertight. Weathertight means
that in any sea conditions water will not penetrate into the ship.
(13)
Audit means a systematic, independent
and documented process for obtaining audit evidence and evaluating
it objectively to determine the extent to which audit criteria are
fulfilled.
(14)
Audit Scheme means the IMO Member
State Audit Scheme established by the Organization and taking into
account the guidelines developed by the Organizationfootnote.
(15)
Code for Implementation means
the IMO Instruments Implementation Code (III Code) adopted by the
Organization by resolution A.1070(28).
(16)
Audit Standard means the Code
for Implementation.”