S.I. No. 424/2001 - Merchant Shipping (Load Line) Rules, 2001

• (iii) 0.03 metre-radians between the angles of heel of 30 degrees and 40 degrees or such lesser angle as is referred to in subparagraph (ii) above.

• (b) The righting lever (GZ) shall be at least 0.20 metres at an angle of heel equal to or greater than 30 degrees.

• (c) The maximum righting lever shall occur at an angle of heel not less than 30 degrees.

• (d) The initial transverse metacentric height shall not be less than 0.15 metres. In the case of a ship carrying a timber deck cargo which complies with subparagraph (a) above by taking into account the volume of timber deck cargo, the initial transverse metacentric height shall not be less than 0.05 metres.

• (3) To determine whether the ship complies with the requirements of subparagraph (2) the ship shall, unless otherwise permitted, be subject to an inclining test which shall be carried out in the presence of a survey or appointed by the Minister, for the ships listed in rule 32(5), a surveyor appointed by the Assigning Authority.

Superstructure end bulkheads

3. Bulkheads at exposed ends of enclosed superstructures shall be of efficient construction. The height of any sill in an excess opening in such a bulkhead shall, except where otherwise stated, be at least 380 millimetres above the deck.

Hatchways: general

4. (1) The provisions of this paragraph and of paragraph 5 and 6 apply to all hatchways in Position 1 or in Position 2 except where otherwise stated.

• (2) Subject to subparagraph (3), the construction and the means for securing the weathertightness of a hatchway shall -

• (a) in the case of a hatchway closed by a portable cover and secured weathertight by tarpaulins and battening devices, comply with the requirements of paragraph 5; and

• (b) in the case of a hatchway closed by a weathertight cover of steel or other equivalent material fitted with gaskets and clamping devices, comply with the requirements of paragraph 6.

• (3) Every hatchway located in an exposed position on a deck above a superstructure deck and leading to a space below shall be of such a construction and be fitted with such means as will secure the weathertightness of the hatchway, having regard to its position.

Hatchways closed by portable covers and secured weathertight by tarpaulins and battening devices

Coamings

5. (1) Every hatchway shall have a coaming of substantial construction. The coaming shall be constructed of mild steel but may be constructed of other material provided that the strength and stiffness of the coaming are equivalent to those of a coaming of mild steel. The height of the coaming above the deck shall be at least -

• (a) 600 millimetres, if the hatchway is in Position 1;

• (b) 450 millimetres, if the hatchway is in Position 2;

Covers

• (2)
• (a) The width of every bearing surface for a hatchway cover shall be at least 65 millimetres.

• (b) In the case of a cover made of wood -

• (i) the finished thickness of the cover shall be at least 60 millimetres in association with a span of not more than 1.5 metres, and the thickness of covers for larger spans shall be increased by 4 millimetres for each 100 millimetres above the span of 1.5 metres;

• (ii) the end of the cover shall be protected by galvanised steel bands efficiently secured.

• (c) In the case of a cover made of mild steel -

• (i) the strength of the cover shall withstand the assumed load given in Table 1, and the product of the maximum stress thus calculated and the factor 4.25 shall not exceed the minimum ultimate strength of the material;

TABLE 1

Ship's Length (L)	Assumed Load, per square metre	Assumed Load, per square metre
	Hatchway in Position 1	Hatchway in Position 2
24 metres	1 tonne	0.75 tonne
100 metres or over	1.75 tonnes	1.30 tonnes
Over 24 metres but less than 100 metres	to be ascertained by linear interpolation	to be ascertained by linear interpolation

• (ii) the cover shall be so designed as to limit the deflection to not more than 0.0028 times the span under the assumed load in Table 1 appropriate to the hatchway cover.

• (d) In the case of a cover made neither of mild steel nor wood the strength and stiffness of the cover shall be equivalent to those of a cover of mild steel.

Portable Beams

• (3)
• (a) Where portable beams for supporting hatchway covers are made of mild steel, their strength shall be such as to withstand the assumed load given in Table 1, and the product of the maximum stress thus calculated and the factor 5 shall not exceed the minimum ultimate strength of the material.

• (b) Such beams shall be so designed as to limit the deflection to not more than 0.0022 times the span under the assumed load in Table 1 appropriate to the beam.

• (c) In the case of portable beams not made of mild steel, the strength and stiffness of the beams shall be equivalent to those of beams of mild steel.

Pontoon covers

• (4)
• (a) Where pontoon covers of mild steel are used in place of portable beams and covers, their strength shall be such as to withstand the assumed load given in Table 1, and the product of the maximum stress thus calculated and the factor 5 shall not exceed the minimum ultimate strength of the material.

• (b) Such pontoon covers shall be so designed as to limit the deflection to not more than 0.0022 times the span under the assumed load in Table 1 appropriate to the pontoon cover.

• (c) Mild steel plating forming the tops of such covers shall not be less in thickness that 1 per cent of the spacing of the stiffeners or 6 millimetres, whichever is the greater.

• (d) In the case of pontoon covers not made of mild steel, the strength and stiffness of the cover shall be equivalent to those of a cover of mild steel.

Carriers or sockets

• (5) Carriers or sockets for portable beams shall be of substantial construction and provide efficient means for the 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

• (6) Cleats shall be set to fit the taper of the wedges. They shall be at least 65 millimetres wide and spaced not more than 600 millimetres, centre to centre. The end cleats along each side or end of the hatchway shall not be more than 150 millimetres from the hatch corners.

Battens and wedges

• (7) Battens and wedges shall be efficient for their purpose and in good condition. Wedges shall be of tough wood or equivalent material cut to a taper of not more than 1 in 6 and shall not be less than 13 millimetres thick at the toes.

Tarpaulins

• (8) At least two layers of tarpaulins shall be provided for every hatchway. They shall be waterproof, in good condition, and have satisfactory strength and equality.

Security of hatchway covers

• (9)
• (a) Except as otherwise provided in subparagraph (b), steel bars shall be provided for every hatchway to ensure that each section of hatchway covers can be efficiently and independently secured after the tarpaulins have been battened down and that hatchway covers of more than 1.5 metres in length are secured by at least two such bars.

• (b) Bars of material other than steel, or means of securing hatchway covers otherwise than by bars, may be used provided -

• (i) in the case of the former the strength and stiffness of the bars used are equivalent to those of steel bars;

• (ii) in either case the degree of security so achieved is not less than that which would be achieved by the use of steel bars.

Hatchways closed by weathertight covers of steel or equivalent material fitted with gaskets and clamping devices

Coamings

6. (1) (a) Except as otherwise provided in subparagraph (b), every hatchway shall have a coaming of substantial construction the height of which above the deck shall be at least -

• (i) 600 millimetres, if the hatchway is in Position 1;

• (ii) 450 millimetres, if the hatchway is in Position 2;

• (b) A hatchway may have a coaming of less than the height applicable under the provisions of subparagraph (a), or in exceptional circumstances a coaming may be dispensed with altogether, provided that -

• (i) the safety of the ship will not be impaired in the worst sea or weather conditions likely to be encountered by the ship in service;

• (ii) when any coaming is fitted it shall be of substantial construction.

Weathertight covers

• (2)
• (a) The strength of every cover of mild steel shall be such as to withstand the assumed load given in Table 1, and the product of the maximum stress thus calculated and the factor 4.25 shall not exceed the minimum ultimate strength of the material. Every such cover shall be so designed as to limit the deflection under such a load to not more than 0.0028 times the span.

• (b) Every such cover made of material other than mild steel shall have a strength and stiffness equivalent to that required for a cover of mild steel.

• (c) Every cover shall be fitted with efficient means by which it can be secured and made weathertight.

• (d) Mild steel plating forming the top of any cover shall be not less in thickness than one per cent of the spacing of the stiffeners of 6 millimetres whichever is the greater.

Machinery space openings

7. (1) Every machinery space opening situated in Position 1 or Position 2 shall be efficiently framed and enclosed by a steel casing of substantial strength, account being taken of the extent, if any, to which the casing is protected by other structures.

• (2) Every doorway in a casing referred to in subparagraph (1) shall be fitted with a steel weathertight door having a sill the height of which shall be at least -

• (a) 600 millimetres above the deck, if the opening is in Position 1;

• (b) 380 millimetres above the deck, if the opening is in Position 2;

• (3) Every opening in such a casing other than a doorway shall be provided with a permanently attached cover of steel fitted with efficient means by which it can be secured and maintained weathertight and, except in the case of a cover consisting of a plate secured by bolts, is capable of being operated from either side of the opening.

• (4) Every fiddley, funnel or machinery space ventilator situated in an exposed position on the freeboard deck or on a superstructure deck shall have a coaming of such a height above the deck as will provide adequate protection having regard to its position.

Miscellaneous openings in freeboard and superstructure decks

8. (1) Every manhole and flush scuttle in Position 1 or Position 2 shall be provided with a substantial cover fitted with efficient means to secure and maintain it watertight. Unless secured by closely spaced bolts, every such cover shall be permanently attached by a chain or equivalent means so as to be available for immediate use at all times.

• (2) Every opening in a deck other than a hatchway, machinery space opening, manhole or flush scuttle shall -

• (a) if situated in the freeboard deck, be protected either by an enclosed superstructure or by a deckhouse or companionway equivalent in strength and weathertightness to an enclosed superstructure;

• (b) if situated in an exposed position -

• (i) in a deck over an enclosed superstructure and giving access to space within the superstructure; or

• (ii) on top of a deckhouse on the freeboard deck and giving access to space below the deck;

be protected by an efficient deckhouse or companionway fitted with weathertight doors;

• (c) if situated in an exposed position in a deck above the deck over an enclosed superstructure and giving access to space within that superstructure, be protected either in accordance with the requirements of subparagraph (b) or to such lesser extent as may be adequate having regard to its position.

• (3) Every door in a companionway, deckhouse or enclosed superstructure referred to in subparagraph (2)(a) or (b) shall have a sill the height of which shall be at least -

• (a) 600 millimetres, if the structure is in Position 1;

• (b) 380 millimetres, if the structure is in Position 2;

Ventilators

9. (1) (a) Except as otherwise provided in subparagraph (b) below, every ventilator in Position 1 or Position 2 leading to spaces below the freeboard deck or below the deck of an enclosed superstructure shall have a coaming of steel or equivalent material, substantially constructed and efficiently connected to the deck. The height of such coamings shall be at least -

• (i) 900 millimetres above the deck, if the ventilator is in Position 1;

• (ii) 760 millimetres above the deck, if the ventilator is in Position 2;

• (b) Where the coaming for any ventilator referred to in subparagraph (a) above is situated in a position in which it will be especially exposed to weather and sea the height of the coaming shall be increased by such an amount as is necessary to provide adequate protection having regard to its position.

• (2) If the coaming of any ventilator referred to in the subparagraph (1) exceeds 900 millimetres in height above the deck it shall be efficiently supported by stays, brackets or other means.

• (3) Every ventilator in Position 1 or Position 2 which passes through a superstructure, other than an enclosed superstructure, shall have a coaming of steel or equivalent material at the freeboard deck substantially constructed and efficiently connected to that deck and at least 900 millimetres in height above that deck.

• (4) Subject to subparagraph (5), every ventilator opening in Position 1 or Position 2 shall be provided with an efficient appliance by which it can be closed and secured weathertight. Every such closing appliance provided on board a ship of not more than 100 metres in length shall be permanently attached and, in the case of any other ship, shall either be so attached or be conveniently stowed near to the ventilator for which it is provided.

• (5)
• (a) A ventilator in Position 1 the coaming of which exceeds 4.5 metres in height above the deck and a ventilator in Position 2 of the coaming of which exceeds 2.3 metres in height above the deck, need not be fitted with a closing appliance unless the fitting of such an appliance is considered necessary by the Assigning Authority in order to provide adequate protection.

• (b) A ventilator leading to a battery room shall not be fitted with a closing appliance.

Air Pipes

10. (1) The exposed parts of any air pipe leading to a ballast or other tank and extending above the freeboard deck or a superstructure deck shall be of substantial construction.

• (2) The exposed opening of any such air pipe shall be fitted with efficient means of closing the opening weathertight, which shall be permanently attached so as to be ready for immediate use.

• (3) Subject to subparagraph (4), the height above the deck of the exposed opening of any such airpipe shall be -

• (a) at least 760 millimetres, if that deck is the freeboard deck;

• (b) at least 450 millimetres, if that deck is a superstructure deck or, if the superstructure is of less than standard height, such height as is necessary to adequately compensate for the lower height of the superstructure.

• (4) The heights given in subparagraph (3) may be reduced if -

• (a) the working of the ship would be unreasonably impaired if those heights were adhered to; and

• (b) the closing arrangements will ensure that the lower height is adequately compensated for.

Cargo ports and similar openings

11. (1) Cargo ports and similar openings in the ship's side below the freeboard deck or in the sides or ends of superstructures which form part of the shell of the ship shall be compatible with the design of the ship and shall not exceed in number those necessary for the proper working of the ship.

• (2) Every such cargo port and opening shall be provided with a door or doors so fitted and designed as to ensure watertightness and structural integrity commensurate with the surrounding shell plating.

• (3) Unless the Assigning Authority permits, the lower edge of any such cargo port or opening shall not be so situated that it is below a line drawn parallel to the freeboard deck at side having as its lowest point the upper edge of the uppermost load line.

Scuppers, inlets and discharges

12. (1) Subject to subparagraph (4), every discharge led through the shell of a ship either-

• (a) from spaces below the freeboard deck; or

• (b) from within any enclosed superstructure, or from within any deckhouse on the freeboard deck which is fitted with weathertight doors;

shall be fitted in accordance with subparagraphs (2) and (3) with the means for preventing water from passing inboard.

• (2) Subject to subparagraph (3), this shall consist of a single automatic non-return valve fitted at the shell of the ship and having positive means of closure from a position or positions above the freeboard deck. Such positions shall be readily accessible at all times under service conditions and shall be provided with an indicator showing whether the valve is open or closed.

• (3)
• (a) If the vertical distance from the Summer load waterline to the inboard end of a discharge pipe exceeds 0.01 (L) two automatic non-return valves having no positive means of closure may be fitted. One valve shall be situated as close to the ship's shell as practicable and be substantially connected to it and the inboard valve shall be so situated that at all times under service conditions it will be readily accessible for examination.

• (b) If the vertical distance referred to in subparagraph (a) above exceeds 0.02(L) the Assigning Authority may permit a single automatic non-return valve having no positive means of closure to be fitted. This valve shall be situated as close to the ship's shell as practicable and be substantially connected to it.

• (4)
• (a) The controls of any valve in an attended machinery space and serving a main or auxiliary sea inlet or discharge or bilge injection system shall be so sited as to be readily accessible for examination at all times under service conditions.

• (b) The controls of any valve in an unattended machinery space and serving a sea inlet or discharge or bilge injection system shall be so cited as to be readily accessible at all times under service conditions, particular attention being paid in this regard to possible delay in reaching or operating the controls. In addition, the machinery space in which the valve is situated shall be equipped within efficient warning device to give warning at suitable control positions of any entry of water into the machinery space other than water resulting from the normal operation of machinery.

• (c) Valves referred to in subparagraph (a) and (b) above shall be equipped with an indicator showing whether the valve is open or closed.

• (5) Subject to subparagraph (6) every scupper and discharge pipe originating at any level and penetrating the shell of the ship either -

• (a) more than 450 millimetres below the freeboard deck; or

• (b) less than 600 millimetres above the Summer load waterline;

shall be equipped with an automatic non-return valve situated as close to the ship's shell as practicable and substantially connected thereto.

• (6) Subparagraph (5) shall not apply -

• (a) where the scupper or discharge pipe is fitted with the means for preventing water from passing inboard in accordance with the provisions of subparagraphs(1) to (3); or

• (b) where the piping of the scupper or discharge pipe is of substantial thickness.

• (7) Every scupper leading from superstructure other than an enclosed superstructure or from a deckhouse not fitted with weathertight doors shall be led overboard.

• (8) All shell fittings, and the valves required by this paragraph, shall be of steel, bronze or other suitable ductile material, and all pipes referred to in this paragraph shall be of steel or equivalent material.

Side Scuttles

13. (1) Every side scuttle to a space below the freeboard deck or to a space within an enclosed superstructure shall be fitted with a hinged inside deadlight so that it can be effectively closed and secured watertight.

• (2) No side scuttle shall be fitted in a position such that its sill will be below a line drawn parallel to the freeboard deck at side and having its lowest point -

• (a) 2.5 per cent of the breadth of the ship above the Summer load waterline (or Summer Timber load waterline, if assigned); or

• (b) 500 millimetres above the Summer load waterline (or Summer Timber load waterline, if assigned);

whichever is the greater distance.

• (3) Every side scuttle, deadlight and glass (if fitted) shall be of substantial construction and be efficiently fitted.

Freeing ports and arrangements

• (2) Except as otherwise provided in subparagraphs (4) and (5), the freeing port area (A) for each well shall -

• (a) if the well is on the freeboard deck or on a raised quarter-deck, be not less than the area ascertained in accordance with subparagraph (3); and

• (b) if the well is on a superstructure deck, other than a raised quarter-deck be not less than one half of the area given by subparagraph (3).

• (3)
• (a) Subject to subparagraph (c) below, where the length (1) of a bulwark in the well is 20 metres or less -

• (A) =0.7+0.035 (1) (square metres); and

• (b) Subject to subparagraph (c) below, where (1) exceeds 20 metres,

(A)=0.07 (1) (square metres).

The length (1) need in no case be greater than 0.7(L).

• (c) 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 deceased by 0.004 square metre per metre of length of well for each 0.1 metre difference in height.

• (4)
• (a) If the deck on which the well is situated has no sheer, the freeing port area shall be the area ascertained in accordance with subparagraph (3) increased by 50 per cent.

• (b) If the deck on which the well is situated has sheer less than standard sheer, the freeing port area shall be the area ascertained in accordance with subparagraph (3) increased by a percentage to be obtained by linear interpolation.

• (c) If the deck on which the well is situated has sheer, two thirds of the freeing port area shall be situated in the half of the well which is nearest to the lowest point of the sheer.

• (5) The lower edge of every freeing port shall be as near to the deck as practicable.

• (6) Every freeing port more than 230 millimetres in depth shall be protected by rails or bars so fixed that the distance between the lowest rail or bar and the lower edge of the freeing port does not exceed 230 millimetres.

• (7) Every freeing port fitted with a shutter shall have sufficient clearance to prevent jamming of the shutter, and the shutter hinges shall have pins or bearings of efficient non-corrodible material.

• (8) Efficient provision shall be made for freeing water from any superstructure other than enclosed superstructure.

• (9) Where a ship fitted with a trunk does not comply with the requirements of paragraph 10(2)(b)(vi) of Schedule 4, “Freeboards”, or where continuous or substantially continuous hatchway side coamings are fitted between detached superstructures, the minimum area of the freeing port openings shall be calculated from the following table:

BREADTH OF HATCHWAY OR TRUNK IN RELATION TO THE BREADTH OF SHIP	AREA OF FREEING PORTS IN RELATION TO THE TOTAL AREA OF THE BULWARKS
40% or less	20%
75% or more	10%

The area of freeing ports at intermediate breadths shall be obtained by linear interpolation.

Protection of the crew

15. (1) Every deckhouse used for the accommodation of members of the crew shall be of efficient construction.

• (2) Except as otherwise provided in subparagraph (3), all exposed parts of the freeboard deck and of every superstructure deck shall be fitted at their perimeter with efficient guard rails or guard wires and stanchions complying with the requirements of subparagraph (4), or with bulwarks. In either case this protection shall be at least 1 metre in height from the deck.

• (3) The height specified in subparagraph (2) may be reduced at a particular point if -

• (a) the normal working of the ship would be unreasonably impeded; and

• (b) adequate protection is provided at that point.

• (4) Guard rails or guard wires fitted in accordance with subparagraph (2) shall consist of courses of rails or wires supported by stanchions efficiently secured to the deck. The opening between the lowest course of the rails or wires and the deck shall not exceed 230 millimetres in height and no opening above that course of rails or wires shall exceed 380mm in height. Where the ship has rounded gunwales the stanchions shall be secured at the perimeter of the flat of the deck.

• (5) Gangways, underdeck passages and all other means of access used by members of the crew to pass between their quarters, the machinery space and any other space in the ship in the course of their necessary work shall be so designed and constructed, and be fitted, where necessary, with life lines, access ladders guard rails, guard wires, hand rails or other safety fittings, as to afford effective protection for the crew.

• (6) Deck cargo carried on any ship shall be so stowed that any opening which is in way of the cargo and which gives access to and from the crew's quarters, the machinery space and all other parts used in the necessary work of the ship, can be properly closed and secured against the admission of water. Effective protection for the crew in the form of guard rails or life lines shall be provided above the deck cargo if there is no convenient passage on or below the deck of the ship.

• (7) The requirements of this paragraph shall not apply in the case of unmanned barges.

PART II - SPECIAL REQUIREMENTS APPLICABLE TO TYPE “A” SHIPS

Application

16. The requirements of paragraphs 17 to 20 apply only to Type “A” ships.

Machinery casings

17. (1) Subject to subparagraph (2), every casing enclosing a machinery space opening in Position 1 or Position 2 shall be protected by either -

• (a) an enclosed poop or bridge of at least standard height; or

• (b) a deckhouse of equal height and equivalent strength and weathertightness.

• (2) Subparagraph (1) shall not apply and the casing need not be protected if -

• (a) there is no opening in the casing which gives direct access from the freeboard deck to the machinery space; or

• (b) the only opening in the casing has a steel weathertight door and leads to a space or passage way which is as strongly constructed as the casing and is separated from the stairway to the machinery space by a second steel weathertight door.

Gangway and access

18. (1) References in this paragraph to a poop or detached bridge apply also to a deckhouse fitted in lieu of and serving the purpose of a poop or detached bridge.

• (2) Access between the poop and the detached bridge shall be by means of either -

• (a) a permanent and efficiently constructed gangway of substantial strength. The gangway shall be at the level of the superstructure deck and have a platform at least 1 metre in width and of non-slip material. Efficient means of access from gangway level to the deck shall be provided at each terminal point. The platform shall be fitted on each side throughout its length with guard rails or guard wires supported by stanchions. Such rails or wires shall consist of not less than 3 courses, the lowest being not more that 230 millimetres, and the uppermost being at least 1 metre above the platform, and no intermediate opening being more than 3280 millimetres in height. Stanchions shall be at intervals of not more that 1.5 metres; or

• (b) an underdeck passage connecting and providing unobstructed access between those structures and complying with the following requirements -

• (i) the passage and all its fittings shall be oil and gas tight;

• (ii) the passage shall be well lighted, and be fitted with efficient gas detection and ventilation systems;

• (iii) it shall be situated immediately below the freeboard deck;

• (iv) its distance from the shell plating shall at no point throughout its length be less than one fifth of the breadth of the ship. Alternatively two underdeck passages may be provided one to port and one to starboard each of which shall comply with the requirements of subparagraphs (i), (ii) and (iii) above;

• (v) means of exit from the passage to the freeboard deck shall be -

• (aa) so arranged as to be as near as practicable to the working areas to be used by the crew;

• (bb) in no case be more than 90 metres apart; and

• (cc) fitted with efficient means of closing which are capable of quick release and operable from either side;

• (vi) openings in the freeboard deck corresponding to the means of exit referred to in subparagraph (v) above shall be protected in accordance with the requirements of paragraph 8(2)(a).

• (3) In adverse weather conditions, where the crew in the course of their duties may be required to go to working areas forward of the detached bridge, or forward of the poop in cases where there is no detached bridge, access shall be by means of -

• (a) a gangway complying with the requirements of subparagraph (2)(a);

• (b) an underdeck passage complying with the requirements of subparagraph (2)(b); or

• (c) a walkway complying with the following requirements -

• (i) be not less than 1 metre in width and be situated on or as near as practicable to the centre line of the ship;

• (ii) if obstructed by pipes or other fittings of a permanent nature, be provided with efficient means of passage over such obstruction;

• (iii) be fitted on each side and throughout its length with guardrails or guard wires complying with the requirements in subparagraph (2)(a);

• (iv) have openings in these guard rails or guard wires which give access to and from the freeboard deck to the working areas used by the crew. These openings shall be on alternate sides of the walkway and be situated not more than 90 metres apart on either side;

• (v) if the length of exposed deck to be traversed by the crew exceeds 70 metres, shelters of substantial construction shall be set in way of the walkway at intervals not exceeding 45 metres, every such shelter being capable of accommodating at least one person and be so constructed as to afford weather protection on the forward, port and starboard sides.

• (4) The requirements of this paragraph shall not apply in the case of unmanned barges.

Hatchway covers

19. The covers of hatchways in exposed positions on the freeboard deck, on a forecastle deck or on the top of an expansion trunk shall be of steel, of efficient construction, and watertight when secured.

Freeing arrangements

20. (1) All exposed parts of the freeboard deck and superstructure decks shall be fitted at their perimeter for at least half of their length with guard rails or guard wires in lieu of bulwarks or with other equally effective freeing arrangements. Such guard rails or guard wires shall comply with the requirements set out in relation to such rails or wires in paragraph 18(2)(a).

• (2) The upper edge of the sheer strake shall be as low as practicable.

• (3) If superstructures of the ship are connected by a trunk, the exposed parts of the freedom deck in way of the trunk shall be fitted at their perimeter throughout their length with guard rails or guard wires complying with the requirements set out in paragraph 18(2)(a).

• (4) If the ship is so constructed that, notwithstanding the provision of freeing ports and arrangements, it will be particularly subjected under service conditions to the building up of quantities of water on the freeboard deck efficient breakwaters shall be fitted in suitable positions on that deck.

PART III - SPECIAL REQUIREMENTS APPLICABLE TO CERTAIN TYPE “B” SHIPS

Application

21. The requirements of paragraphs 22 to 25 apply only to Type “B” ships assigned a reduced freeboard under the provisions of paragraph 5(3) of Schedule 4.

Gangway and access

22. The ship shall comply with the requirements of either -

• (1) paragraph 18 as if it were a Type “A” ship; or

• (2) paragraph 23 and 24.

23. (1) References in this paragraph to a poop or detached bridge apply also to a deckhouse fitted in lieu of and serving the purpose of a poop or detached bridge.

• (2) Access between the poop and the detached bridge shall be by means of an efficiently constructed gangway of substantial strength fitted on or near the centre line of the ship. The gangway shall be at least 1 metre in width and shall be fitted on each side and throughout its length with guard rails or guard wires complying with the requirements as set out in paragraph 18(2)(a). If the length of the gangway exceeds 70 metres, shelters complying with the requirements set out in paragraph 18(3)(v) shall be provided in way of the gangway.

24. (1) In adverse weather conditions, where the crew in the course of their duties may be required to go to working areas forward of the detached bridge, or forward of the poop in cases where there is no detached bridge, access shall be by -

• (a) the means described in paragraph 18(3);

• (b) the means described in paragraph 23(2); or

• (c) equivalent means of access.

• (2) Where hatchway coamings are 600 millimetres or more in height, two walkways complying with the following requirements may be provided in lieu of subparagraph (1) -

• (a) the walkways shall be efficiently constructed and of satisfactory strength;

• (b) the walkways shall each be at least 1 metre in width and be fitted on the freeboard deck alongside the outboard structure of the hatchway coamings, one to port and the other to starboard of the hatchways;

• (c) on the side outboard of the hatchways each walkway shall be fitted with guard rails or guard wire complying with the requirements set out in paragraph 18(2)(a).

Freeing arrangements

25. The ship shall comply with the requirements of paragraph 20(4).

PART IV - SPECIAL REQUIREMENTS APPLICABLE TO SHIPS ASSIGNED TIMBER FREEBOARDS

Application and interpretation

26. (1) The requirements of paragraphs 27 to 29 apply only to ships assigned timber freeboards. The requirements of paragraph 30 shall apply in respect of timber deck cargo carried by a ship which is marked with timber load lines and is loaded to a depth greater than that indicated by the load line which, if timber load lines were not marked, would be appropriate in the circumstances.

• (2) In this Part except where the context otherwise requires -

“deck cargo” means cargo carried in any uncovered space on the deck of a ship;

“timber deck cargo” means deck cargo consisting of timber;

“weather deck” means the uppermost complete deck exposed to weather and sea, a deck which is stepped being taken to consist for this purpose of the lowest line of the deck and the continuation of that line parallel to the upper part of the deck.

Superstructures

27. (1) The ship shall have a forecastle of not less that the standard height of an enclosed superstructure and not less in length than 0.07(L).

• (2) If the ship is less than 100 metres in length it shall be fitted aft with either -

• (a) a poop of not less than standard height; or

• (b) a raised quarter-deck having either a deck house or a strong steel hood, so that the total height is not less than the standard height of an enclosed superstructure.

Double bottom tanks

28. Double bottom tanks fitted within the midship half length of the ship shall have satisfactory watertight longitudinal subdivision.

Bulwarks, guard rails and stanchions

29. The ship shall be fitted with -

• (1) permanent bulwarks at least 1 metre in height which are specially stiffened on the upper edge and supported by strong bulwark stays attached to the deck and provided with freeing ports complying with the requirements of paragraph 14(1) to (7).

• (2) efficient guard rails and stanchions at least 1 metre in height, of specially strong construction, and complying with the requirements of paragraph 15(4).

Stowage

Siting, distribution and stowage of timber deck cargo

30. (1) The cargo shall be distributed and stowed so -

• (a) as to avoid excessive loading having regard to the strength of the deck and the supporting structure of the ship;

• (b) as to ensure that the ship will retain adequate stability at all stages of the voyage having regard in particular to -

• (i) the vertical distribution of the deck cargo;

• (ii) the wind moments which can be expected on the voyage;

• (iii) the losses of weight in the ship, including those due to the consumption of fuel and stores; and

• (iv) possible increases of weight of the ship or deck cargo, including those due to the absorption of water and to icing;

• (c) as not to impair the weathertight or watertight integrity of any part of the ship or its fittings or appliances, and to ensure the proper protection of ventilators and air pipes;

• (d) that its height above the deck, or any part of the ship on which it stands will not interfere with the navigation or working of the ship;

• (e) that it will not interfere with, or obstruct access to, the ship's steering arrangements, including emergency steering arrangements;

• (f) that it is in accordance with paragraph 15(6).

Securing of deck cargo

• (2) Deck cargo shall be so secured as to ensure, as far as practicable, that there will be no movements of that cargo relative to the ship in the worst sea and weather conditions which may normally be expected on the voyage, and lashings and all fittings used for their attachment shall be of adequate strength for that purpose.

Maximum height of timber deck cargo

• (3) Timber deck cargo carried by a ship within a Winter seasonal area during the period specified as the Winter period in relation to that ship shall be so stowed that at no point throughout its length does the height of the deck cargo above the level of the weather deck at side exceed one third of the extreme breadth of the ship.

Access

• (4) Where timber deck cargo occupies the whole or substantially the whole of the uncovered space on the deck of a ship, means of access for the crew between their quarters and the machinery spaces and other parts of the ship used in the working of the ship shall be provided in the form of a walkway fitted over the timber deck cargo and complying with the requirements of paragraph 15(6). In addition guard rails or life lines spaced not more than 330 millimetres apart vertically shall be provided on each side of the deck cargo to a height of at least 1 metre above the cargo.

Uprights

• (5) If the nature of the timber is such that uprights are necessary in order to comply with subparagraphs (6) and (7), uprights shall be fitted which are of sufficient strength for the purpose. They shall be secured in position by angles or metal sockets of sufficient strength for the purpose or by equivalent means and shall be so spaced as to provide efficient support taking into account the nature and length of the timber, so however that the space between any two uprights fore and aft shall not exceed 3 metres.

Stowage of timber deck cargo in relation to superstructures

• (6)
• (a) Timber deck cargo stowed in any well between superstructures shall be stowed as solidly as possible so as to extend over the entire available length of the well to a height not less than the standard height of a superstructure other than a raised quarter deck.

• (b) Timber deck cargo stowed in a position having a limiting superstructure at the forward end but no such superstructure at the after end shall be stowed so as to extend over the entire available length between the superstructure and the after end of the aftermost hatchway, to the height and in the manner specified in subparagraph (a) above.

Securing of timber deck cargo

• (7)
• (a) Timber deck cargo shall be efficiently secured throughout its length by independent overall lashings spaced not more than 3 metres apart. Eye plates for these lashings shall be efficiently attached to the sheer strake or to the deck stringer plate at intervals of not more than 3 metres. The distance from an end bulkhead of a superstructure to the first eye plate shall be not more than 2 metres. When there is no bulkhead, eye plates and lashings shall be provided at distances of 0.6 metres and 1.5 metres from the ends of the timber deck cargo.

• (b) Lashings shall be of not less than 19 millimetres close link chain or of flexible wire rope of equivalent strength, fitted with sliphooks and turnbuckles so positioned as to be accessible at all times. Wire rope lashings shall have a length of long link chain sufficient to permit the length of lashings to be regulated.

• (c) When timber is less than 3.6 metres in length the spacing of the lashings shall be reduced or suitable provision made to suit the length of timber.

PART V - GENERAL

Equivalence

31. The Assigning Authority may, with the approval of the Minister -

• (a) allow any fitting, material, appliance or apparatus to be fitted in a ship, or allow other provisions to be made in a ship, in the place of any fitting, material, appliance, apparatus or provision respectively which is required under any of the provisions of this Schedule if satisfied by trial or otherwise that it is at least as effective as that so required; or

• (b) allow in any exceptional case departure from the requirements of any of the said provisions on condition that the freeboards to be assigned to the ship are increased to such an extent as to satisfy the Minister that the safety of the ship and protection afforded to the crew will be no less effective than would be the case if the ship fully complied with those requirements and there was no such increase of freeboards.

SCHEDULE 3

Rule 24

RECORD OF PARTICULARS

MERCHANT SHIPPING (LOAD LINE) RULES 2001

RECORD OF PARTICULARS RELATING TO CONDITIONS OF ASSIGNMENT

In this record, reference to Rules are references to the Rules set out in Annex I to the Convention of 1966, and reference to paragraphs are references to paragraphs of Schedule 2 (Conditions of Assignment) to the Merchant Shipping (Load Line) Rules, 2001.

Name of ship

Port of registry

Nationality

Distinctive number of letters

Shipbuilders

Yard Number

Date of Build/conversion

Freeboards assigned as a ship of Type

Classification

Date and place of initial survey

A plan of suitable size may be attached to this report in preference to the sketches on this page

Disposition and dimensions of superstructures, trunks, deckhouses, machinery casings; extent of bulwarks, guard rails and wood sheathing on exposed deck, to be inserted in the diagrams and tables following; together with positions of hatchways, gangways, and other means for the protection of the crew; cargo ports, bow and stern doors, side scuttles, scuppers, ventilators, air pipes, companionways, and other items that would affect the seaworthiness of the ship.

See Schedule 2 Paragraphs 7 and 8.

DOORWAYS IN SUPERSTRUCTURES, EXPOSED MACHINERY CASINGS AND DECKHOUSES PROTECTING OPENINGS IN FREEBOARD AND SUPERSTRUCTURE DECKS

LOCATION	REF NO ON SKETCH OR PLAN	NUMBER AND SIZE OF OPENINGS	HEIGHT OF SILLS	CLOSING APPLIANCES	CLOSING APPLIANCES
				TYPE AND MATERIAL	NUMBER OF CLIPS
In forecastle bulkhead
In bridge forward bulkhead
In bridge after bulkhead
In raised quarter deck bulkhead
In poop bulkhead
In exposed machinery casings on freeboard or raised quarter decks
In exposed machinery casings on superstructure decks
In machinery casings within superstructures or deckhouses on freeboard deck
In deckhouses in Position 1 enclosing openings leading below freeboard deck
In deckhouses in Position 2 enclosing openings leading below freeboard deck
In exposed machinery casings on freeboard or raised quarter decks

HATCHWAYS AT POSITIONS 1 AND 2 CLOSED BY PORTABLE COVERS AND SECURED WEATHERTIGHT BY TARPAULINS AND BATTENING DEVICES (Para 15).

See Schedule 2 Paragraph 5.

Position and Reference No. on Sketch or Plan	Position and Reference No. on Sketch or Plan
Dimensions of clear opening at top of coaming	Dimensions of clear opening at top of coaming
Height of coamings above deck	Height of coamings above deck
PORTABLE BEAMS	Number
	Spacing
	bl × tf
	D × tw
	b2 × tf
	Bearing surface
	Means of securing each beam
PORTABLE COVERS	Material
PORTABLE COVERS	Thickness
PORTABLE COVERS	Direction fitted
PORTABLE COVERS	Bearing surface
Spacing of cleats
TARPAULINS	No. of layers
TARPAULINS	Material

Means of securing each section of covers ............................................................ .............................

Are wood covers fitted with galvanised bands ............................................................ ......................

See Schedule 2 Paragraphs 6 and 19.

HATCHWAYS AT POSITIONS 1 AND 2 CLOSED BY WEATHERTIGHT COVERS OF STEEL (OR OTHER EQUIVALENT MATERIAL) FITTED WITH GASKETS AND CLAMPING DEVICES (Para 16)?

Position and Reference No. on Sketch or Plan
Dimensions of clear opening at top of coaming
Height of coaming above deck
Type of cover or Parent Name
Material
Position and Reference No. on Sketch or Plan
Dimensions of clear opening at top of coaming
Height of coaming above deck
Type of cover or Patent Name
Material

See Schedule 2 Paragraphs 7 and 8.

MACHINERY SPACE OPENINGS AND MISCELLANEOUS OPENINGS IN FREEBOARD AND SUPERSTRUCTURE DECKS (Paras 17 and 18)

Positions and Reference No. on Sketch or Plan	Positions and Reference No. on Sketch or Plan
Dimensions
Height of coaming
COVER	Material
	How attached
Number and spacing of Toggles	Number and spacing of Toggles
Positions and Reference No. on Sketch or Plan	Positions and Reference No. on Sketch or Plan
Dimensions
Height of coaming
COVER	Material
	How attached
Number and spacing of Toggles	Number and spacing of Toggles

Particulars of spurling pipe closing arrangements

See Schedule 2 Paragraph 9.

VENTILATORS ON FREEBOARD AND SUPERSTRUCTURE DECKS (POSITIONS 1 AND 2) (Para 19)

DECK ON WHICH FITTED	NUMBER FITTED	COAMING	COAMING	TYPE (STATE PATENT NAME IF ANY)	CLOSING APPLIANCES
		DIMENSIONS	HEIGHT

See Schedule 2 Paragraph 10.

AIR PIPES ON FREEBOARD AND SUPERSTRUCTURE DECKS (Para 20)

DECK ON WHICH FITTED	NUMBER FITTED	COAMING	COAMING	TYPE (STATE PATENT NAME IF ANY)	CLOSING APPLIANCES
		DIMENSIONS	HEIGHT

See Schedule 2 Paragraph 11.

CARGO PORTS AND OTHER SIMILAR OPENINGS (Para 11)

POSITION OF PORT	DIMENSIONS OF OPENING	DISTANCE OF LOWER EDGE FROM FREEBOARD DECK	SECURING DEVICES	REMARKS

See Schedule 2 Paragraph 12.

SCUPPERS, INLETS AND DISCHARGES (Rule 19)

STATE IF SCUPPER OR DISCHARGE	NUMBER	PIPE	PIPE	PIPE	FROM	VERTICAL DISTANCE ABOVE TOP OF KEEL	VERTICAL DISTANCE ABOVE TOP OF KEEL	VERTICAL DISTANCE ABOVE TOP OF KEEL	NUMBER, TYPE AND MATERIAL OF DISCHARGE VALVES	POSITION OF CONTROLS
						DISCHARGE	DISCHARGE	UPPER MOST VALVE
		DIAMETER	THICKNESS	MATERIAL		OUTLET IN HULL	INBOARD END

NOTE: In Ro-ro ships, indicate how ready accessibility to scupper valves is ensured when vehicle space is filled ..............................................

S - Scupper	MS - Mild Steel	SD - screw down
D - Discharge	CS - Cast Steel	ANR - Automatic non-return
GM - Gun	Metal SD ANR - Screw down automatic non-return	Metal SD ANR - Screw down automatic non-return

Any other approved material to be designated.

See Schedule 2 Paragraph 12.

SIDE SCUTTLES (Rule 20)

POSITION	NUMBER FITTED	CLEAR GLASS SIZE	FIXED OR OPENING	MATERIAL	MATERIAL	TYPE OF GLASS AND THICKNESS	STANDARD USED AND TYPE NO.
				FRAME	DEADLIGHT

Indicate the vertical distance between the freeboard deck and the lower still of the side scuttle positioned at the greatest vertical distance below the freeboard deck.

See Schedule 2 Paragraphs 14 and 20

FREEING PORTS (Rule 21)

	LENGTH OF BULWARK	HEIGHT OF BULWARK	NUMBER AND SIZE OF FREEING PORTS EACH SIDE	TOTAL AREA EACH SIDE	REQUIRED AREA EACH SIDE
FREEBOARD DECK AFTER WELL FORWARD WELL
FREEBOARD DECK AFTER WELL FORWARD WELL
SUPERSTRUCTURE DECK
---	---
State fore and aft position of each freeing port in relation	After Well
to superstructure end bulkheads	Forward Well

Particulars of shutters, bars or rails fitted to freeing ports.

Height of lower edge of freeing port above deck.

(See Schedule 2 Paragraphs 15, 18, 22, 23 and 24)

PROTECTION OF THE CREW (Rules 22 and 23)

State particulars of bulwarks or guardrails on freeboard and superstructure decks: State details of lifelines, walkways, gangways or underdeck passageways where required to be fitted:
(See Schedule 2 Paragraph 29) TIMBER DECK CARGO FITTINGS State particulars of uprights, sockets, lashings, guardrails and lifelines;
OTHER SPECIAL FEATURES

INITIAL SURVEY

The conditions of assignment shown on this form are a record of the arrangements and fittings provided on the ship and are in accordance with the requirements of the relevant Rules set out in Annex I to the Convention of 1966 and of Schedule 2 to the Merchant Shipping (Load Line) Rules, 2001.

............................................................ ......................

(Surveyor's Signature)

............................................................ .......................

• (Date)

SUBSEQUENT RENEWAL SURVEYS

I have completed the renewal survey and am satisfied that the fittings and appliances are in accordance with the particulars shown in this record and are in good condition and that approved stability information and, where applicable, information relating to loading and ballasting of the ship is on board.

Signature	Port of Survey	Date of Survey
..............................................	..............................................	.........................................
..............................................	..............................................	.........................................
..............................................	..............................................	.........................................
..............................................	..............................................	.........................................

SCHEDULE 4

Rule 26

FREEBOARDS

Interpretation

1. Expressions in this Schedule have the same meanings as those assigned to them in Schedule 2 and -

“block coefficient (Cb)” means the product of-

	∇
	LBd1

where -

∇ is the volume of the moulded displacement of the ship (excluding bossing) if the ship has a metal shell, and of displacement to the outer surface of the hull if the ship has a shell of any other material, displacement being taken in each case at a moulded draught of d1; and

d1 is 85 per cent of the least moulded depth, provided that in no case shall the block coefficient

• (Cb) be taken to be less than 0.68.

“depth for freeboard (D)” means -

• (a) except as otherwise stated in subparagraph (b) below, the moulded depth of the ship amidships plus the thickness of the freeboard deck stringer plate where fitted, plus if the exposed freeboard deck is sheathed, the product of -

	T((L) - (S))
	(L)

where -

T is the mean thickness of the exposed sheathing clear of deck openings;

• (b) in a ship having a rounded gunwale with a radius greater than 4 per cent of the breadth of the ship or having topsides of unusual form, the depth calculated in accordance with subparagraph (a) above, would be the depth for freeboard purposes of a ship having a midship section with vertical topsides and with the same round of beam and the same area of topside section as that of the midship section of the actual ship;

“effective length (E)” in relation to a superstructure means the effective length of the superstructure determined in accordance with the provisions of paragraph 9(3);

“flush deck ship” means a ship which has no superstructure on the freeboard deck;

“length (S)” in relation to a superstructure means the length of the superstructure determined in accordance with the provision of paragraph 9(2);

“salt water” means water having a relative density of 1.025;

“Summer draught” means the draught measured from -

• (a) in the case of a wood or composite ship, the lower edge of the keep rabbet;

• (b) if the form at the lowest part of the midship section is of a hollow character, or if thick garboards are fitted, the point where the line of the flat of the bottom continued inwards cuts the side of the keel; and

• (c) in any other case, the top of the keel;

to the point which, when load lines and marks have been marked on the ship's side, will correspond to the centre of the ring of the load line mark;

“Summer Timber draught” means the draught measured from point (a), (b) or (c) described in the definition of the Summer draught to the point which when Timber load lines have been marked on the ship's side will correspond to the upper edge of the Summer Timber load line;

“tabular freeboard” means in the case of a Type “A” ship the freeboard appropriate to the ship's length under Freeboard Table A set out in Schedule 5 and, in the case of a Type “B” ship, the freeboard appropriate to the ship's length under Freeboard Table B.

Freeboards: general

2. (1) Except as otherwise provided in subparagraph (2), the freeboards, other than Timber freeboards, to be assigned to a ship shall be determined in accordance with the provisions of Part I, and Timber freeboards to be assigned to a ship shall be determined in accordance with Part II.

• (2) The freeboards to be assigned to -

• (a) sailing ships;

• (b) tugs;

• (c) ships of wood or of composite construction or of other materials;

• (d) ships with constructional features such as to render freeboards determined in accordance with subparagraph (1) unreasonable or impracticable; and

• (e) unmanned barges having on the freeboard deck only small access openings closed by watertight gasket covers of steel;

shall be determined in accordance with the provisions of Part III of this Schedule.

PART 1 - FREEBOARDS OTHER THAN TIMBER FREEBOARDS

Determination of freeboards

3. (1) Subject to subparagraph (3), the Summer freeboard shall be determined in accordance with the provisions of paragraphs 4 to 16.

• (2) Subject to subparagraph (3), the Tropical freeboard shall be obtained by deducting from the Summer freeboard one forty-eighth (1/48th) of the Summer draught of the ship.

• (3) The freeboard so obtained in subparagraphs (1) and (2), but omitting any correction made in paragraph 8 for deck-line, shall be not less than 50 millimetres except in the case of a ship with hatchways in Position 1 to which paragraph 5 of Schedule 2 applies but which do not have pontoon covers, in which case it shall be not less than 150 millimetres.

• (4) The Winter freeboard shall be obtained by adding to the Summer freeboard one forty-eighth (1/48th) of the Summer draught of the ship.

• (5) The Winter North Atlantic freeboard shall be obtained by adding to the Winter freeboard a distance of 50 millimetres.

• (6)
• (a) Subject to subparagraph (b) below, the fresh water freeboard shall be obtained by deducting from the Summer freeboard the quantity -

	▴	millimetres
	4T

where -

▴ is the displacement in salt water in tonnes at the Summer load waterline, and

T represents tonnes per centimetre immersion in salt water at that waterline.

• (b) In any case in which the displacement at that waterline cannot be ascertained the deduction shall be one forty-eighth (1/48th) of the Summer draught of the ship.

Summer freeboard: Type “A” ships

4. The Summer freeboard assigned to a Type “A” ship shall be determined as follows.

• (1) There shall first be ascertained the ship's tabular freeboard from Table A in Schedule 5.

• (2) If the block coefficient (Cb) of the ship exceeds 0.68 the tabular freeboard shall be multiplied by the factor

	(Cb) + 0.68
	1.36

• (3) Corrections in accordance with paragraphs 6 to 16 shall be applied to the freeboard obtained in accordance with subparagraphs (1) and (2).

• (4) Subject to paragraph 3(3), the freeboard so corrected shall be the Summer freeboard assigned to the ship.

Summer freeboard: Type “B” ships

5. The Summer freeboard to be assigned to a Type “B” ship shall be determined as follows.

• (1) There shall first be ascertained the ship's tabular freeboard from Table B in Schedule 5.

• (2)
• (a) If the ship has hatchways in Position 1 the covers of which are either pontoon covers complying with the requirements of paragraph 5 (4) of Schedule 2 or covers which comply with paragraph 6(2) of that Schedule, the tabular freeboard may be corrected in accordance with such of the provisions of subparagraphs (3) to (7) as are applicable to the ship.

• (b) If the ship has hatchways in Position 1 the covers of which comply with the requirements of paragraph 5 of Schedule 2 except those of subparagraph (4) of that paragraph, the tabular freeboard shall be corrected in accordance with the provisions of subparagraph (8).

• (3) The tabular freeboard of a ship to which subparagraph (2)(a) applies and which exceeds 100 metres in length may be reduced by an amount not exceeding the maximum applicable under subparagraphs (4) and (5) if the Assigning Authority is satisfied that -

• (a) the measures for the protection of the crew comply with the requirements of paragraph 15 of Schedule 2;

• (b) the freeing arrangements comply with the requirements of paragraph 14 of Schedule 2;

• (c) all covers of hatchways in Positions 1 and 2 comply with the requirements of paragraph 6 of Schedule 2;

• (d) the ship when loaded to the Summer load waterline will remain afloat, after the flooding of any single damaged compartment other than the machinery space at an assumed permeability of 0.95, in the condition of equilibrium described in subparagraph (6). If the length of the ship exceeds 225 metres the machinery space shall rank as floodable compartment for the purposes of this requirement having for the purpose an assumed permeability of 0.85.

• (4) Subject to subparagraph (5) no reduction of freeboard pursuant to subparagraph (3) shall exceed 60 per cent of the difference between the tabular freeboards under Freeboard Table A and Freeboard Table B.

• (5) The reduction of 60 per cent referred to in subparagraph (4) may be increased to 100 per cent if the Assigning Authority is satisfied that -

• (a) the ship complies with the requirements of paragraphs 17 and 20 of Schedule 2 as if it were a Type “A” ship and with those of paragraph 22 of that Schedule;

• (b) the ship complies with the requirements of subparagraphs (3)(a) to (c); and

• (c) the ship when loaded to the Summer load waterline will remain afloat in the condition of equilibrium described in subparagraph (6) after the flooding -

• (i) of any two compartments adjacent fore and aft, neither of which is the machinery space, at an assumed permeability of 0.95; and

• (ii) in the case of a ship exceeding 225 metres in length, of the machinery space alone, at an assumed permeability of 0.85.

• (6) The condition of equilibrium referred to in subparagraphs (3) and (5) above is as follows-

• (a) the final waterline after flooding is below the top of any ventilator coaming, the lower edge of any air pipe opening, the upper edge of the sill of any access opening fitted with a weathertight door, and the lower edge of any other opening through which progressive flooding may take place;

• (b) the angle of heel due to unsymmetrical flooding does not exceed 15 degrees, or if no part of the deck is immersed the angle of heel does not exceed 17 degrees;

• (c) the metacentric height calculated using the constant displacement method has a positive value of at least 50 millimetres in the upright condition after flooding;

• (d) the ship has adequate residual stability; and

• (e) the ship has sufficient stability during intermediate stages of flooding to the satisfaction of the Assigning Authority;

• (7) The following assumptions shall be made for the purposes of calculations pursuant to subparagraphs (3)(d) and (5)(c) -

• (a) the very extent of damage is equal to the depth of the ship at the point of damage, measured from and including the freeboard deck at side to the underside of the keel;

• (b) the transverse penetration of damage is not more than one fifth of the breadth of the ship (B), this distance being measured inboard from the ship's side at right angles to the centre line of the ship at the level of the Summer load waterline. The depth of transverse penetration damage assumed shall be that which results in the most severe conditions;

• (c) except in the case of compartments referred to in subparagraph (5)(c)(i), no transverse bulkhead is damaged;

• (d) the height of the centre of gravity above the base-line is assessed allowing for homogeneous loading of cargo holds and for 50 per cent of the designed capacity of consumable fluids and stores.

• (8) The tabular freeboard of a ship to which subparagraph (2)(b) applies shall be increased by the amount shown in Table 1 appropriate to the ship's length. Freeboards, at intermediate lengths of ship shall be obtained by linear interpolation. The increase in the case of ships of more than 200 metres in length shall be by an amount which the Minister determines in each particular case.

• (9)
• (a) This subparagraph applies to every Type “B” ship of not more than 100 metres in length having enclosed superstructures the total effective length (E) of which does not exceed 35 per cent of the ship's length (L).

• (b) The freeboard calculated in respect of such a ship in accordance with subparagraphs (1),(2) and (8) shall be increased by the following amount -

		(E)
	7.5 (100-(L)) ( (0.35	(L)	) millimetres

• (10) In the case of a ship with a block coefficient (C) exceeding 0.68, the freeboard calculated in accordance with subparagraphs (1) to (9) shall be multiplied by the factor -

	(Cb) + 0.68
	1.36

• (11) Corrections in accordance with paragraph 6 to 16 shall be applied to the freeboard calculated in accordance with subparagraphs (1) to (10) and, subject to paragraph 3(3), the freeboard so corrected shall be the Summer freeboard to be assigned to the ship.

TABLE 1

Length of ship (metres)	Freeboard increase (millimetres)	Length of ship (metres)	Freeboard increase (millimetres)	Length of ship (metres)	Freeboard increase millimetres
108 and below	50	139	175	170	290
109	52	140	181	171	292
110	55	141	186	172	294
111	57	142	191	173	297
112	59	143	196	174	299
113	62	144	201	175	301
114	64	145	206	176	304
115	68	146	210	177	306
116	70	147	215	178	308
117	73	148	219	179	311
118	76	149	224	180	313
119	80	150	228	181	315
120	84	151	232	182	318
121	87	152	236	183	320
122	91	153	240	184	322
123	95	154	244	185	325
124	99	155	247	186	327
125	103	156	251	187	329
126	108	157	254	188	332
127	112	158	258	189	334
128	116	159	261	190	336
129	121	160	264	191	339
130	126	161	267	192	341
131	131	162	270	193	343
132	136	163	273	194	346
133	142	164	275	195	348
134	147	165	278	196	350
135	153	166	280	197	353
136	159	167	283	198	355
137	164	168	285	199	357
138	170	169	287	200	358

Basic freeboard

6. In the following paragraphs “basic freeboard” means the Summer freeboard calculated in accordance with paragraph 4 or 5, whichever is applicable, but omitting, in the case of a Type “A” ship, the corrections referred to in paragraph 4(3), or in the case of a Type “B” ship, the corrections referred to in paragraph 5(11).

Correction for Depth

7. (1) If the depth for freeboard (D) exceeds	(L)	, the basic freeboard of the ship shall be
increased by -	15
---	---	---
	(	(D) -
	(

Where R is -

	(L)	, in the case of a ship less than 120 metres in length; and
	0.48

250 in the case of a ship of 120 metres or more in length.

(2) If (D) is less than	(L)	, the basic freeboard of the ship shall be reduced -
	15
---	---	---
	(	(D) -
	(

if, but only if, the ship has, subject to subparagraph (3), either -

• (a) an enclosed superstructure covering at least 0.6 (L) amidships;

• (b) an efficient trunk extending for the ship's length; or

• (c) a combination of enclosed superstructures connected by efficient trunks, being a combination extending for the ship's length.

• (3) If the height of any such superstructure or trunk in subparagraph (2) is less than standard height the amount of reduction shall be reduced in the ratio of the actual to the standard height of the superstructure or trunk.

Correction for position of deck-line

8. (1) Subject to the provisions of subparagraph (2), if the actual depth to the upper edge of the deck-line is greater or less than the depth for freeboard, the difference if greater shall be added to, or if less shall be deducted from, the basic freeboard of the ship.

• (2) If the position of the deck-line has been fixed in accordance with the provisions of rule 16(3), the actual depth of the ship shall be taken to the point amidships where the continuation outwards of the upper surface of the freeboard deck or on any sheathing on that deck intersects the outer surface of the shell of the ship.

Standard height, length and effective length of superstructures

9. (1) The standard height of a superstructure shall be determined in accordance with Table 2 -

TABLE 2

Length of ship	Standard Height (metres)	Standard Height (metres)
(L) (metres)	of a raised quarter deck	of a superstructure other than a raised quarter deck
30 or less	0.90	1.80
75	1.20	1.80
125 or more	1.80	2.30

Standard heights for intermediate lengths of the ship shall be obtained by linear interpolation

• (2)
• (a) Subject to subparagraph (b) below, the length of a superstructure (S) shall be the mean length of the parts of the superstructure which lie within the length of the ship.

• (b) In the case of an enclosed superstructure having an end bulkhead which extends in a fair convex curve beyond its intersection with the superstructure sides, the length of the superstructure (S) may be taken as its length determined in accordance with subparagraph (a), but increased by two-thirds of the fore and aft extent of the curvature to a maximum of one half the breadth of the superstructure at the point of intersection of the curved end of the superstructure with its side.