|
Стр. 7
English and French languages, both texts being equally authentic.
Official translations in the Russian and Spanish languages shall
be prepared and deposited with the signed original.
In witness whereof the undersigned being duly authorized by
their respective Governments for that purpose have signed the
present Convention.
Done at London this fifth day of April 1966.
(Further follow the signatures of the Representatives.)
Annex I
REGULATIONS FOR DETERMINING LOAD LINES
Chapter I. GENERAL
The Regulations assume that the nature and stowage of the
cargo, ballast, etc., are such as to secure sufficient stability
of the ship and the avoidance of excessive structural stress.
The Regulations also assume that where there are international
requirements relating to stability or subdivision, these
requirements have been complied with.
Regulation 1
Strength of Ship
The Administration shall satisfy itself that the general
structural strength of the ship is sufficient for the draught
corresponding to the freeboard assigned. Ships built and
maintained in conformity with the requirements of a classification
society recognized by the Administration may be considered to
possess adequate strength.
Regulation 2
Application
(1) Ships with mechanical means of propulsion or lighters,
barges or other ships without independent means of propulsion,
shall be assigned freeboards in accordance with the provisions of
Regulations 1 - 40 inclusive of this Annex.
(2) Ships carrying timber deck cargoes may be assigned, in
addition to the freeboards prescribed in paragraph (1) of this
Regulation, timber freeboards in accordance with the provisions of
Regulations 41 - 45 inclusive of this Annex.
(3) Ships designed to carry sail, whether as the sole means of
propulsion or as a supplementary means, and tugs, shall be
assigned freeboards in accordance with the provisions of
Regulations 1 - 40 inclusive of this Annex. Such additional
freeboard shall be required as determined by the Administration.
(4) Ships of wood or of composite construction, or of other
materials the use of which the Administration has approved, or
ships whose constructional features are such as to render the
application of the provisions of this Annex unreasonable or
impracticable, shall be assigned freeboards as determined by the
Administration.
(5) Regulations 10 - 26 inclusive of this Annex shall apply to
every ship to which a minimum freeboard is assigned. Relaxations
from these requirements may be granted to a ship to which a
greater than minimum freeboard is assigned on condition that the
Administration is satisfied with the safety conditions provided.
Regulation 3
Definitions of Terms used in the Annexes
(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 keel as defined in sub-paragraph
(5) (a) of this Regulation, 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 T(L-S)/L 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 (C ) is given by:
b
_
V
C = -------; where
b L.B.d
1
_
V 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
d ; and where
1
d is 85 per cent of the least moulded depth.
1
(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 opening's 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 assigment 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.
Regulation 4
Deck Line
The deck line is a horizontal line 300 millimetres (12 inches)
in length and 25 millimetres (1 inch) in breadth. It shall be
marked amidships on each side of the ship, and its upper edge
shall normally passes through the point where the continuation
outwards of the upper surface of the freeboard deck intersects the
outer surface of the shell (as illustrated in Figure 1 <*>),
provided that the deck line may be placed with reference to
another fixed point on the ship on condition that the freeboard is
correspondingly corrected. The location of the reference point and
the identification of the freeboard deck shall in all cases be
indicated on the International Load Line Certificate (1966).
--------------------------------
<*> Не приводится.
Regulation 5
Load Line Mark
The Load Line Mark shall consist of a ring 300 millimetres
(12 inches) in outside diameter and 25 millimetres (1 inch) wide
which is intersected by a horizontal line 450 miilimetres
(18 inches) in length and 25 millimetres (1 inch) in breadth, the
upper edge of which passes through the centre of the ring. The
centre of the ring shall be placed amidships and at a distance
equal to the assigned summer freeboard measured vertically below
the upper edge of the deck line (as illustrated in Figure 2 <*>).
--------------------------------
<*> Не приводится.
Regulation 6
Lines to be Used with the Load Line Mark
(1) The lines which indicate the load line assigned in
accordance with these Regulations shall be horizontal lines
230 millimetres (9 inches) in length and 25 millimetres (1 inch)
in breadth which extend forward of, unless expressly provided
otherwise, and at right angles to, a vertical line 25 millimetres
(1 inch) in breadth marked at a distance 540 millimetres
(21 inches) forward of the centre of the ring (as illustrated in
Figure 2).
(2) The following load lines shall be used:
(a) The Summer Load Line indicated by the upper edge of the
line which passes through the centre of the ring and also by a
line marked S.
(b) The Winter Load Line indicated by the upper edge of a line
marked W.
(c) The Winter North Atlantic Load Line indicated by the upper
edge of a line marked WNA.
(d) The Tropical Load Line indicated by the upper edge of a
Tine marked T.
(e) The Fresh Water Load Line in summer indicated by the upper
edge of a line marked F. The Fresh Water Load Line in summer is
marked abaft the vertical line. The difference between the Fresh
Water Load Line in summer and the Summer Load Line is the
allowance to be made for loading in fresh water at the other load
lines.
(f) The Tropical Fresh Water Load Line indicated by the upper
edge of a line marked TF, and marked abaft the vertical line.
(3) If timber freeboards are assigned in accordance with these
Regulations, the timber load lines shall be marked in addition to
ordinary load lines. These lines shall be horizontal lines
230 millimetres (9 inches) in length and 25 millimetres (1 inch)
in breadth which extend abaft unless expressly provided otherwise,
and are at right angles to, a vertical line 25 millimetres (1
inch) in breadth marked at a distance 540 millimetres (21 inches)
abaft the centre of the ring (as illustrated in Figure 3 <*>).
--------------------------------
<*> Не приводится.
(4) The following timber load lines shall be used:
(a) The Summer Timber Load Line indicated by the upper edge of
a line marked LS.
(b) The Winter Timber Load Line indicated by the upper edge of
a line marked LW.
(c) The Winter North Atlantic Timber Load Line indicated by
the upper edge of a line marked LWNA.
(d) The Tropical Timber Load Line indicated by the upper edge
of a line marked LT.
(e) The Fresh Water Timber Load Line in summer indicated by
the upper edge of a line marked LF and marked forward of the
vertical line.
The difference between the Fresh Water Timber Load Line in
summer and the Summer Timber Load Line is the allowance to be made
for loading in fresh water at the other timber load lines.
(f) The Tropical Fresh Water Timber Load Line indicated by the
upper edge of a line marked LTF and marked forward of the vertical
line.
(5) Where the characteristics of a ship or the nature of the
ship's service or navigational limits make any of the seasonal
lines inapplicable, these lines may be omitted.
(6) Where a ship is assigned a greater than minimum freeboard
so that the load line is marked at a position corresponding to, or
lower than, the lowest seasonal load line assigned at minimum
freeboard in accordance with the present Convention, only the
Fresh Water Load Line need be marked.
(7) On sailing ships only the Fresh Water Load Line and the
Winter North Atlantic Load Line need be marked (as illustrated in
Figure 4 <*>).
--------------------------------
<*> Не приводится.
(8) Where a Winter North Atlantic Load Line is identical with
the Winter Load Line corresponding to the same vertical line, this
load line shall be marked W.
(9) Additional load lines required by other international
conventions in force may be marked at right angles to and abaft
the vertical line specified in paragraph (1) of this Regulation.
Regulation 7
Mark of Assigning Authority
The mark of the Authority by whom the load lines are assigned
may be indicated alongside the load line ring above the horizontal
line which passes through the centre of the ring, or above and
below it. This mark shall consist of not more than four initials
to identify the Authority's name, each measuring approximately
115 millimetres (4 1/2 inches) in height and 75 millimetres (3
inches) in width.
Regulation 8
Details of Marking
The ring, lines and letters shall be painted in white or
yellow on a dark ground or in black on a light ground. They shall
also be permanently marked on the sides of the ships to the
satisfaction of the Administration. The marks shall be plainly
visible and, if necessary, special arrangements shall be made for
this purpose.
Regulation 9
Verification of Marks
The International Load Line Certificate (1966) shall not be
delivered to the ship until the officer or surveyor acting under
the provisions of Article 13 of the present Convention has
certified that the marks are correctly and permanently indicated
on the ship's sides.
Chapter II. CONDITIONS OF ASSIGNMENT OF FREEBOARD
Regulation 10
Information to be Supplied to the Master
(1) The master of every new ship shall be supplied with
sufficient information, in an approved form, to enable him to
arrange for the loading and ballasting of his ship in such a way
as to avoid the creation of any unacceptable stresses in the
ship's structure, provided that this requirement need not apply to
any particular length, design or class of ship where the
Administration considers it to be unnecessary.
(2) The master of every new ship which is not already provided
with stability information under an international convention for
the safety of life at sea in force shall be supplied with
sufficient information in an approved form to give him guidance as
to the stability of the ship under varying conditions of service,
and a copy shall be furnished to the Administration.
Regulation 11
Superstructure End Bulkheads
Bulkheads at exposed ends of enclosed superstructures shall be
of efficient construction and shall be to the satisfaction of the
Administration.
Regulation 12
Doors
(1) All access openings in bulkheads at ends of enclosed
superstructures shall be fitted with doors of steel or other
equivalent material, permanently and strongly attached to the
bulkhead, and framed, stiffened and fitted so that the whole
structure is of equivalent strength to the unpierced bulkhead and
weathertight when closed. The means for securing these doors
weathertight shall consist of gaskets and clamping devices or
other equivalent means and shall be permanently attached to the
bulkhead or to the doors themselves, and the doors shall be so
arranged that they can be operated from both sides of the
bulkhead.
(2) Except as otherwise provided in these Regulations, the
height of the sills of access openings in bulkheads at ends of
enclosed superstructures shall be at least 380 millimetres
(15 inches) above the deck.
Regulation 13
Position of Hatchways, Doorways and Ventilators
For the purpose of the Regulations, two positions of
hatchways, doorways and ventilators are defined as follows:
Position 1 - Upon exposed freeboard and raised quarter decks,
and upon exposed superstructure decks situated forward of a point
located a quarter of the ship's length from the forward
perpendicular.
Position 2 - Upon exposed superstructure decks situated abaft
a quarter of the ship's length from the forward perpendicular.
Regulation 14
Cargo and Other Hatchways
(1) The construction and the means for securing the
weathertightness of cargo and other hatchways in positions 1 and 2
shall be at least equivalent to the requirements of Regulations 15
and 16 of this Annex.
(2) Coamings and hatchway covers to exposed hatchways on decks
above the superstructure deck shall comply with the requirements
of the Administration.
Regulation 15
Hatchways Closed by Portable Covers and Secured
Weathertight by Tarpaulins and Battening Devices
Hatchway Coamings
(1) The coamings of hatchways closed by portable covers
secured weathertight by tarpaulins and battening devices shall be
of substantial construction, and their height above the deck shall
be at least as follows:
600 millimetres (23 1/2 inches) if in position 1.
450 millimetres (17 1/2 inches) if in position 2.
Hatchway Covers
(2) The width of each bearing surface for hatchway covers
shall be at least 65 millimetres (2 1/2 inches).
(3) Where covers are made of wood the finished thickness shall
be at least 60 millimetres (2 3/8 inches) in association with a
span of not more than 1.5 metres (4.9 feet).
(4) Where covers are made of mild steel the strength shall be
calculated with assumed loads not less than 1.75 metric tons per
square metre (358 pounds per square foot) on hatchways in position
1, and not less than 1.30 metric tons per square metre (266 pounds
per square foot) on hatchways in position 2, and the product of
the maximum stress thus calculated and the factor 4.25 shall not
exceed the minimum ultimate strength of the material. They shall
be so designed as to limit the deflection to not more than
0.0028 times the span under these loads.
(5) The assumed loads on hatchways in position 1 may be
reduced to 1 metric ton per square metre (205 pounds per square
foot) for ships of 24 metres (79 feet) in length and shall be not
less than 1.75 metric tons per square metre (358 pounds per square
foot) for ships of 100 metres (328 feet) in length. The
corresponding loads on hatchways in position 2 may be reduced to
0.75 metric tons per square metre (154 pounds per square foot) and
1.30 metric tons per square metre (266 pounds per square foot)
respectively. In all cases values at intermediate lengths shall be
obtained by linear interpolation.
Portable Beams
(6) Where portable beams for supporting hatchway covers are
made of mild steel the strength shall be calculated with assumed
loads nut less than 1.75 metric tons per square metre (358 pounds
per squars fool) on hatchways in position 1 and not less than
1.30 metric tons per square metre (266 pounds per square foot) on
hatchways in position 2 and the product of the maximum stress thus
calculated and the factor 5 shall not exceed the minimum ultimate
strength of the material. They shall be so designed as to limit
the deflection to not more than 0.0022 times the span under these
loads. For ships of not more than 100 metres (328 feet) in length
the requirements of paragraph (5) of this Regulation are
applicable.
Pontoon Covers
(7) Where pontoon covers used in place of portable beams and
covers are made of mild steel the strength shall be calculated
with the assumed loads given in paragraph (4) of this Regulation,
and the product of the maximum stress thus calculated and the
factor 5 shall not exceed the minimum ultimate, strength of the
material. They shall be so designed as to limit the deflection to
not more than 0.0022 times the span. Mild steel plating forming
the lops of covers shall be not less in thickness than one per
cent of the spacing of stiffeners or 6 millimetres (0.24 inches)
if that be greater. For ships of not more than 100 metres
(328 feet) in length the requirements of paragraph (5) of this
Regulation are applicable.
(8) The strength and stiffness of covers made of materials
other than mild steel shall be equivalent to those of mild steel
to the satisfaction of the Administration.
Carriers or Sockets
(9) Carriers or sockets for portable beams shall be of
substantial construction, and shall provide means for the
efficient fitting and securing of the beams. Where rolling types
of beams are used, the arrangements shall ensure that the beams
remain properly in position when the hatchway is closed.
Cleats
(10) Cleats shall be set to fit the taper of the wedges. They
shall be at least 65 millimetres. (2 1/2 inches) wide and spaced
not more than 600 millimetres (23 1/2 inches) centre to centre;
the cleats along each side оr end shall be not more than
150 millimetres (6 inches) from the hatch corners.
Battens and Wedges
(11) Battens and wedges shall be efficient and in good
condition. Wedges shall be of tough wood or other equivalent
material. They shall have a taper of not more than 1 in 6 and
shall be not less than 13 millimetres (1/2 inch) thick at the
toes.
Tarpaulins
(12) At least two lavers of tarpaulin in good condition shall
be provided for each hatchway in position 1 or 2. The tarpaulins
shall be waterproof and of ample strength. They shall be of a
material of at least an approved standard weight and quality.
Security of Hatchway Covers
(13) For all hatchways in position 1 or 2 steel bars or other
equivalent means shall be provided in order efficiently and
independently to secure each section of hatchway covers after the
tarpaulins are battened down. Hatchway covers of more than 1.5
metres (4.9 feet) in length shall be secured by at least two such
securing appliances.
Regulation 16
Hatchways Closed by Weathertight Covers of Steel
or Other Equivalent Material Fitted with Gaskets
and Clamping Devices
Hatchway Coamings
(1) At positions 1 and 2 the height above the deck of hatchway
coamings fitted with weathertight hatch covers of steel or other
equivalent material fitted with gaskets and clamping devices shall
be as specified in Regulation 15 (1). The height of these coamings
may be reduced, or the coamings omitted entirely, on condition
that the Administration is satisfied that the safety of the ship
is not thereby impaired in any sea conditions. Where coamings are
provided they shall be of substantial construction.
Weathertight Covers
(2) Where weathertight covers are of mild steel the strength
shall be calculated with assumed loads not less than 1.75 metric
tons per square metre (358 pounds per square foot) on hatchways in
position 1, and not less than 1.30 metric tons per square metre
(266 pounds pet square foot) on hatchways in position 2, and the
product of the maximum stress thus calculated and the factor of
4.25 shall not exceed the minimum ultimate strength of the
material. They shall be so designed as to limit the deflection to
not more than 0.0028 times the span under these loads. Mild steel
plating forming the tops of covers shall be not less in thickness
than one per cent of the spacing of stiffeners or 0.6 millimetres
(0.24 inches) if that be greater. The provisions of Regulation 15
(5) are applicable for ships of not more than 100 metres (328
feet) in length.
3) The strength and stiffness of covers made of materials
other than mild steel shall be equivalent to those of mild steel
to the satisfaction of the Administration.
Means for Securing Weathertightness
(4) The means for securing and maintaining weathertightness
shall be to the satisfaction of the Administration. The
arrangements shall ensure that the tightness can be maintained in
any sea conditions, and for this purpose tests for tightness shall
be required at the initial survey, and may be required at
periodical surveys and at annual inspections or at more frequent
intervals.
Regulation 17
Machinery Space Openings
(1) Machinery space openings in position 1 or 2 shall be
properly framed and efficiently enclosed by steel casings of ample
strength, and where the casings are not protected by other
structures their strength shall be specially considered. Access
openings in such casings shall be fitted with doors complying with
the requirements of Regulation 12 (1), the sills of which shall be
at least 600 millimetres (23 1/2 inches) above the deck if in
position 1, and at least 380 millimetres (15 inches) above the
deck if in position 2. Other openings in such casings shall be
fitted with equivalent covers, permanently attached in their
proper positions.
(2) Coamings of any fiddley, funnel or machinery space
ventilator in an exposed position on the freeboard or
superstructure deck shall be as high above the deck as is
reasonable and practicable. Fiddley openings shall be fitted with
strong covers of steel or other equivalent material permanently
attached in their proper positions and capable of being secured
weathertight.
Regulation 18
Miscellaneous Openings in Freeboard and
Superstructure Decks
(1) Manholes and flush scuttles in position 1 or 2 or within
superstructures other than enclosed superstructures shall be
closed by substantial covers capable of being made watertight.
Unless secured by closely spaced bolts, the covers shall be
permanently attached.
(2) Openings in freeboard decks other than hatchways,
machinery space openings, manholes and flush scuttles shall be
protected by an enclosed superstructure, or by a deckhouse or
companionway of equivalent strength and weathertightness. Any such
opening in an exposed superstructure deck or in the top of a
deckhouse on the freeboard deck which gives access to a space
below the freeboard deck or a space within an enclosed
superstructure shall be protected by an efficient deckhouse or
companionway. Doorways in such deck-houses or companionways shall
be fitted with doors complying with the requirements of Regulation
12 (1).
(3) In position 1 the height above the deck of sills to the
doorways in companionways shall be at least 600 millimetres
(23 1/2 inches). In position 2 it shall be at least
380 millimetres (15 inches).
Regulation 19
Ventilators
(1) Ventilators in position 1 or 2 to spaces below freeboard
deck or decks of enclosed superstructures shall have coamings of
steel or other equivalent material, substantially constructed and
efficiently connected to the deck. Where the coaming of any
ventilator exceeds 900 millimetres (35 1/2 inches) in height above
the deck it shall be specially supported.
(2) Ventilators passing through superstructures other than
enclosed superstructures shall have substantially constructed
coamings of steel or other equivalent material at the freeboard
deck.
(3) Ventilators in position 1 the coamings of which extend to
more than 4.5 metres (14.8 feet) above the deck, and in position 2
the coamings of which extend to more than 2.3 metres (7.5 feet)
above the deck, need not be fitted with closing arrangements
unless specifically required by the Administration.
(4) Except as provided in paragraph (3) of this Regulation
ventilator openings shall be provided with efficient weathertight
closing appliances. In ships of not more than 100 metres (328
feet) in length the closing appliances shall be permanently
attached; where not so provided in other ships, they shall be
conveniently stowed near the ventilators to which they are to be
fitted. Ventilators in position 1 shall have coamings of a height
of at least 900 millimetres (35 1/2 inches) above the deck: in
position 2 the coamings shall be of a height at least 760
millimetres (30 inches) above the deck.
(5) In exposed positions, the height of coamings may be
required to be increased to the satisfaction of the
Administration.
Regulation 20
Air Pipes
Where air pipes to ballast and other tanks extend above the
freeboard or superstructure decks, the exposed parts of the pipes
shall be of substantial construction; the height from the deck to
the point where water may have access below shall be at least 760
millimetres (30 inches) on the freeboard deck and 450 millimetres
(17 1/2 inches) on the superstructure deck. Where these heights
may interfere with the working of the ship, a lower height may be
approved, provided the Administration is satisfied that the
closing arrangements and other circumstances justify a lower
height. Satisfactory means permanently attached, shall be provided
for closing the openings of the air pipes.
Regulation 21
Cargo Ports and Other Similar Openings
(1) Cargo ports and other similar openings in the sides of
ships below the freeboard deck shall be fitted with doors so
designed as to ensure watertightness and structural integrity
commensurate with the surrounding shell plating. The number of
such openings shall be the minimum compatible with the design and
proper working of the ship.
(2) Unless permitted by the Administration, the lower edge of
such openings shall not be below a line drawn parallel to the
freeboard deck at side. which has at its lowest point the upper
edge of the uppermost load line.
Regulation 22
Scuppers, Inlets and Discharges
(1) Discharges led through the shell either from spaces below
the freeboard deck or from within superstructures and deckhouses
on the freeboard deck fitted with doors complying with the
requirements of Regulation 12 shall be fitted with efficient and
accessible means for preventing water from passing inboard.
Normally each separate discharge shall have one automatic
non-return valve with a positive means of closing it from a
position above the freeboard deck. Where, however, the vertical
distance from the summer load waterline to the inboard end of the
discharge pipe exceeds 0.01 L, the discharge may have two
automatic non-return valves without positive means of closing,
provided that the inboard valve is always accessible for
examination under service conditions; where that vertical distance
exceeds 0.02 L a single automatic non-return valve without
positive means of closing may be accepted subject to the approval
of the Administration. The means for operating the positive action
valve shall be readily accessible and provided with an indicator
showing whether the valve is open or closed.
(2) In manned machinery spaces main and auxiliary sea inlets
and discharges in connexion with the operation of machinery may be
controlled locally. The controls shall be readily accessible and
shall be provided with indicators showing whether the valves are
open or closed.
(3) Scuppers and discharge pipes originating at any level and
penetrating the shell either more than 450 millimetres (17 1/2
inches) below the freeboard deck or less than 600 millimetres (23
1/2 inches) above the summer load waterline shall be provided with
a non-return valve at the shell. This valve, unless required by
paragraph (1), may be omitted if the piping is of substantial
thickness.
(4) Scuppers leading from superstructures or deckhouses not
fitted with doors complying with the requirements of Regulation 12
shall be led overboard.
(5) All valves and shell fittings required by this Regulation
shall be of steel, bronze or other approved ductile material.
Valves of ordinary cast iron or similar material are not
acceptable. All pipes to which this Regulation refers shall be of
steel or other equivalent material to the satisfaction of the
Administration.
Regulation 23
Side Scuttles
(1) Side scuttles to spaces below the freeboard deck or to
spaces within enclosed superstructures shall be fitted with
efficient hinged inside deadlights arranged so that they can be
effectively closed and secured watertight.
(2) No side scuttle shall be fitted in a position so that its
sill is below a line drawn parallel to the freeboard deck at side
and having its lowest point 2.5 per cent of the breadth (B) above
the load waterline, or 500 millimetres (19 1/2 inches), whichever
is the greater distance.
(3) The side scuttles, together with their glasses, if fitted,
and deadlights, shall be of substantial and approved construction.
Regulation 24
Freeing Ports
(1) Where bulwarks on the weather portions of freeboard or
superstructure decks form wells, ample provision shall be made for
rapidly freeing the decks of water and for draining them. Except
as provided in paragraphs (2) and (3) of this Regulation, the
minimum freeing port area (A) on each side of the ship for each
well on the freeboard deck shall be that given by the following
formulae in cases where the sheer in way of the well is standard
or greater than standard. The minimum area for each well on
superstucture decks shall be one-half of the area given by the
formulae.
Where the length of bulwark (l) in the well is 20 metres or
less
A= 0.7 + 0.35 l square metres,
where l exceeds 20 metres
A = 0.07 l square metres.
l need in no case be taken as greater than 0.7 L.
If the bulwark is more than 1.2 metres in average height, the
required area shall be increased by 0.004 square metres per metre
of length of well for each 0.1 metre difference in height. If the
bulwark is less than 0.9 metre in average height, the required
area may be decreased by 0.004 square metres per metre of length
of well for each 0.1 metre difference in height.
Or,
where the length of bulwark (l) in the well is 66 feet or less
A = 7.6 + 0.115 l square feet,
where l exceeds 66 feet
A = 0.23 l square feet.
l need in no case be taken as greater than 0.7 L.
If the bulwark is more than 3.9 feet in average height, the
required area shall be increased by 0.04 square feet per foot of
length of well for each foot difference in height. If the bulwark
is less than 3 feet in average height, the required area may be
decreased by 0.04 square feet per foot of length for each foot
difference in height.
(2) In ships with no sheer the area calculated according to
paragraph (1) of this Regulation shall be increased by 50 per
|
