I, THE ADMINISTRATOR of the Government of the Commonwealth of Australia, acting with the advice of the Federal Executive Council, hereby make the following Regulations under the Navigation Act 1912-1966.
Dated this day of , 1967.
Administrator.
By His Excellency’s Command,
(Sgd.) GORDON FREETH
Minister of State for Shipping and Transport.
__________
Amendments of the Navigation (Load Lines) Regulations. †
Interpretation.
Regulation 4 of the Navigation (Load Lines) Regulations is amended—
(a) by omitting the definition of “amidships” and inserting in its stead the following definition:—
“‘amidships’ means the point, on the water line used for the purposes of ascertaining the length of the ship, that is situated one-half of the length of the ship measured from the foreside of the stem of the ship;”;
(b) by inserting after the definition of “assigning authority” the following definition:—
“‘bulk carrier’ means a single decked vessel, with main machinery aft, possessing constructional features similar to those of a tanker, which afford extra invulnerability against the sea, designed for the carriage of dry bulk cargoes in some or all of the cargo holds, and so designed that, if longitudinal bulkheads are fitted, there is no restriction on their separation;”;
(c) by inserting, before paragraph (a) of the definition of “length” the following paragraph:—
“(aa) in the case of a Type A ship or a Type B ship—
(i) a distance equal to ninety-six per centum of the total length of the ship measured on a waterline that is at a distance, measured from the top of the keel, equal to eighty-five per centum of the least moulded depth of the ship; or
(ii) if the distance measured from the foreside of the stem to the axis of the rudder stock measured on that waterline is greater than the distance referred to in the last preceding paragraph, that greater distance;”;
† Statutory Rules 1935, No 66, as amended by Statutory Rules 1951, No. 138; 1956, No. 6; 1959. No. 53; and 1962, No. 88.
22982/66—Price 20c 10/20.4.1967
(d) by inserting, in paragraphs (a) and (b) of the definition of “length” after the word “ship”, the words “,other than a Type A ship or a Type B ship,”;
(e) by inserting after the definition of “mean freeboard” the following definitions:—
“‘ore carrier’ means a single decked vessel, with machinery aft, possessing constructional features similar to those of a tanker, which afford extra invulnerability against the sea, designed for the carriage of mineral ores in bulk, having the central dry cargo holds formed by two longitudinal bulkheads spaced not more than three-fifths of the beam apart and having a double bottom fitted in way of the cargo holds;
“‘ore-oil combination carrier’ means an ore carrier that is so constructed that it can carry dry and liquid cargoes;”;
(f) by omitting the definition of “special steamer freeboard” and inserting in its stead the following definitions:—
“‘special steamer’ means—
(a) an ore carrier over 300 feet in length but not over 600 feet in length;
(b) an ore-oil combination carrier over 300 feet in length but not over 600 feet in length;
(c) a bulk carrier over 300 feet in length but not over 600 feet in length; or
(d) a Type B ship;
“‘special steamer freeboard’ means a freeboard assigned under these Regulations to a special steamer;”;
(g) by omitting the definition of “tanker freeboard” and inserting in its stead the following definition:—
“‘tanker freeboard’ means—
(a) a freeboard assigned under Part IX. of the Load Line Rules; or
(b) a freeboard assigned to a Type A ship;”;
(h) by omitting the definition of “the Load Line Rules” and inserting in its stead the following definition:—
“‘the Load Line Rules’ means the Load Line Rules, 1959, made by the Minister of Transport of the United Kingdom on the eighteenth day of December, 1959; the Load Line (Amendment) Rules, 1961, made by the Minister of Transport of the United Kingdom on the twenty-third day of March, 1961; the Load Line (Amendment) (No. 3) Rules, 1961, made by the Minister of Transport of the United Kingdom on the fifth day of October, 1961; the Load Line (Amendment) Rules, 1964, made by the Minister of Transport of the United Kingdom on the twenty-fifth day of May, 1964; the Load Line (Amendment) Rules, 1965, made by the Board of Trade of the United Kingdom on the tenth day of August, 1965; and the Load Line (Amendment) Rules, 1967, made by the Board of Trade of the United Kingdom on the tenth day of February, 1967;”;
(i) by omitting the definition “Timber Cargo Regulations” and inserting in its stead the following definition;—
“‘Timber Cargo Regulations’ means the Timber Cargo Regulations, 1958, made by the Minister of Transport and Civil Aviation of the United Kingdom on the tenth day of April, 1958;”;
(j) by inserting after the definition of “timber ship” the following definitions:—
“‘Type A ship’ means a tanker over 600 feet in length—
(a) that is designed to carry only liquid cargoes in bulk;
(b) the cargo tanks of which have only small access openings closed by watertight gasketed covers of steel or equivalent material;
(c) having a high integrity of the exposed deck; and
(d) having a high degree of safety against flooding resulting from the low permeability of cargo spaces when loaded and the degree of subdivision provided;
“‘Type B ship’ means a bulk carrier, an ore carrier, or an ore-oil combination carrier, over 600 feet in length;”; and
(k) by inserting at the end of that regulation the following sub-regulation:—
“(2.) For the purposes of the Fifth and Sixth Schedules to these Regulations, a reference to a hatchway in position 1, a doorway in position 1 or a ventilator in position 1 is a reference to a hatchway, doorway or ventilator, as the case may be, in a position upon an exposed freeboard deck, exposed raised quarter deck or an exposed superstructure deck situated forward of a point located a quarter of the ship’s length from the forward perpendicular, and a reference to a hatchway in position 2, a doorway in position 2, or a ventilator in position 2 is a reference to a hatchway, doorway or ventilator, as the case may be, in a position upon an exposed superstructure deck situated abaft a quarter of the ship’s length from the forward perpendicular.”.
Application for Load Line Certificate.
Regulation 6 of the Navigation (Load Lines) Regulations is amended by inserting after the words “such plans” (wherever occurring) the words “and calculations”.
Load line survey.
Regulation 7 of the Navigation (Load Lines) Regulations is amended—
(a) by inserting after paragraph (a) of sub-regulation (2.) the following paragraph:—
“(aa) that, unless exempted by the Minister from complying with the requirement of this paragraph, the master carries on the ship detailed plans showing the arrangements to be followed for the loading and ballasting of the ship which are necessary to avoid the dangers of adverse stress in the ship’s structure;”;
(b) by omitting paragraphs (d) and (e) of sub-regulation (2.) and inserting in their stead the following paragraphs:—
“(d) in the case of an application for the issue or renewal of a certificate in respect of tanker freeboards, that the ship—
(i) being a tanker of not more than 600 feet in length, also complies with the provisions of the Load Line Rules relating to freeboards for tankers to the extent thereby required in her case; or
(ii) being a Type A ship, also complies with the provisions of the Load Line Rules (other than rule 96 of those Rules) relating to freeboards for tankers, with the conditions of assignment contained in Part I., and with the damaged stability and sub-division criteria contained in Part II., of the Fifth Schedule to these Regulations;
“(e) in the case of an application for the issue or renewal of a certificate in respect of special steamer freeboards for a special steamer other than a Type B ship, that the ship also complies with the provisions of the Load Line Rules appropriate to a tanker and with such of the provisions of Part I. of the Sixth Schedule to these Regulations as are appropriate to an ore carrier, an ore-oil combination carrier or a bulk; carrier, as the case requires; and
“(f) in the case of an application for the issue or renewal of a certificate in respect of special steamer freeboards for a ship that is a Type B ship, that the ship also complies with the provisions of the Load Line Rules (other than rule 96 of those Rules) appropriate to a tanker and with the conditions of assignment contained, or referred to, in Part II. of the Sixth Schedule to these Regulations.”;
(c) by inserting in sub-regulation (4.), after the word “satisfied”, the words “,in the case of a ship other than a Type A ship or a special steamer,”; and
(d) by inserting after sub-regulation (4.) the following sub-regulations:—
“(4a.) On receipt of the Surveyor’s report, the assigning authority shall, if satisfied, in the case of a Type A ship, that the ship complies with the provisions of the Load Line Rules (other than rule 96 of those Rules) appropriate to a tanker and with the provisions of the Fifth Schedule to these Regulations, assign freeboards to the ship in accordance with those Rules and with the provisions of that Schedule on the basis that the minimum freeboard to be assigned to the ship will be computed from the Table in Part III. of the Fifth Schedule to these Regulations for a ship of the length of the Type A ship.
“(4b.) On receipt of the Surveyor’s report, the assigning authority shall, if satisfied—
(a) in the case of a special steamer being an ore carrier, an ore-oil combination carrier or a bulk carrier, that the ship complies with the provisions of the Load Line Rules appropriate to a tanker and with the conditions of assignment contained, or referred to, in the Sixth Schedule to these Regulations appropriate to the ship; or
(b) in the case of a special steamer being a Type B ship, that the ship complies with the provisions of the Load Line Rules (other than rule 96 of those Rules) appropriate to a tanker and with the conditions of assignment contained, or referred to, in Part II. of the Sixth Schedule to these Regulations,
assign freeboards to the ship computed on the basis set out in that Schedule.
“(4c.) Where freeboards are assigned to a ship under either of the last two preceding sub-regulations, the assigning authority shall furnish to the owner particulars of the load lines so assigned and the position at which the deck-line and the load lines are to be marked on the ship.”.
Marks on steamers.
Regulation 10 of the Navigation (Load Lines) Regulations is amended by omitting from the proviso to paragraph (c) the words “or a steamer of special type” and inserting in their stead the words “,a special steamer or a Type A ship”.
Marks on tankers, special steamers and Type A ships.
Regulation 13 of the Navigation (Load Lines) Regulations is repealed and the following regulation inserted in its stead:—
“13.—(1.) This regulation applies to—
(a) a tanker to which a tanker freeboard is assigned in accordance with the Load Line Rules;
(b) a special steamer to which a freeboard is assigned in accordance with the Load Line Rules and the Sixth Schedule to these Regulations; and
(c) a Type A ship to which a freeboard is assigned in accordance with the Load Line Rules and the Fifth Schedule to these Regulations.
“(2.) A ship to which this regulation applies shall be marked with the lines referred to in regulation 10, but the Winter North Atlantic Load Line shall always be marked whatever the length of the ship.”.
Fifth and Sixth Schedules.
The Navigation (Load Lines) Regulations are amended by adding at the end thereof the following Schedules:—
THE FIFTH SCHEDULE Regulation 7.
PART I.—CONDITIONS OF ASSIGNMENT OF FREEBOARD FOR TYPE A SHIPS
In this Schedule, a reference to an item by number is a reference to the item so numbered in this Schedule.
The freeboard allowance shall not be allowed in respect of a superstructure unless—
(a) the superstructure is—
(i) 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 four per centum of the breadth; or
(ii) the superstructure is a raised quarter-deck;
(b) the superstructure is enclosed and the enclosing bulkheads at exposed ends are of efficient construction;
(c) the access openings, if any, in those enclosing bulkheads are fitted with doors so arranged that they can be operated from both sides of the bulkhead and made of steel or other equivalent material permanently and strongly attached to the bulkhead and so framed, stiffened and fitted that—
(i) the whole structure is of a strength equivalent to that which the bulkhead would have if it was not pierced; and
(ii) the whole structure is so constructed that, when those openings are closed, water will not penetrate into the ship;
(d) the doors so fitted in the openings in the end bulkheads are secured in a weather-tight condition by gaskets and clamping devices permanently attached to the bulkheads or to the doors;
(e) all other openings in the sides and ends of the superstructure are fitted with effective means of closing that will prevent water penetrating into the ship; and
(f) the height of the sills of access openings at bulkheads at the ends of the enclosed superstructure are at least 1 foot 3 inches above the deck, or if another height above the deck is specified in this Schedule or the Sixth Schedule, that other height.
The freeboard allowance shall not be allowed in respect of a bridge or poop unless, when the bulkhead openings are closed, alternative means of access are provided for the crew to reach machinery and other working spaces inside the bridge or poop.
The freeboard allowance shall not be allowed in respect of any trunk unless the breadth of the trunk is 60 per centum of the breadth of the ship, or, where there is no superstructure, the length of the trunk is not less than 60 per centum of the length of the ship.
The freeboard assigned to the ship shall be such that the structural strength of the hull of the ship is sufficient for the draught that corresponds to the freeboard so assigned.
The construction and means for securing the weathertightness of cargo and other hatchways in positions 1 and 2 closed by weathertight covers of steel or other equivalent material fitted with gaskets and clamping devices shall be at least equivalent to the requirements of item 8.
Coamings and hatchway covers to exposed hatchways on decks above the superstructure deck shall be of adequate strength and integrity.
8.—(1.) In position 1 or position 2, the height above the deck of hatchway coamings of substantial construction fitted with weathertight hatch covers of steel or other equivalent material fitted with gaskets and clamping devices shall be not less than 1 foot 111/2 inches if in position 1 and not less than 1 foot 5½ inches in position 2, but the height of the coamings may be reduced, or the coamings omitted entirely, if the safety of the ship will not be thereby impaired in any sea conditions.
(2.) Where weathertight covers are of mild steel the strength shall be such that with a loading of 358 pounds per square foot on hatchways in position 1, and of 266 pounds per square foot on hatchways in position 2, the product of the maximum stress so calculated and the factor 4.25 shall not exceed the minimum ultimate strength of the material.
(3.) The weathertight covers shall be designed so as to limit the deflection to not more than 0.0028 times the span under the loads referred to in the last preceding sub-item, and the mild steel plating forming the tops of covers shall be not less in thickness than 1 per centum of the spacing of stiffeners, or 0.24 inches, whichever is the greater.
(4.) The strength and stiffness of covers made of materials other than mild steel shall be equivalent to those of mild steel.
(5.) The means of securing and maintaining weathertightness shall ensure that the weathertightness can be maintained in any sea conditions, and, for that purpose, tests for weathertightness shall be required at the initial survey, and may be required at periodical surveys and at annual inspections or at more frequent intervals.
9.—(1.) Machinery space openings in position 1 or position 2 shall be properly framed and efficiently enclosed by steel casings of sufficient strength, and access openings in those casings shall be fitted with doors complying with the requirements of paragraphs (c) and (d) of item 2, the sills of which shall be not less than 1 foot 11½ inches above the deck if in position 1, and not less than 1 foot 3 inches above the deck in position 2 and other openings in those casings shall be fitted with equivalent covers permanently attached in their proper positions.
(2.) Coamings of ventilators to a boiler space, a funnel or a machinery space, being coamings in an exposed position on the freeboard deck or superstructure deck, shall be as high above the deck as is reasonable and practicable, and openings into boiler and machinery spaces shall be fitted with strong covers of steel or other equivalent material permanently attached in their proper positions and capable of being secured weathertight.
10.—(l.) Manholes and flush scuttles in position 1 or position 2 or within superstructures other than enclosed superstructures shall be closed by substantial covers capable of being made watertight, and, 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 companion-way of equivalent strength and weathertightness.
(3.) Such an 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 and the doorways in those deckhouses or companionways shall be fitted with doors complying with the requirements of paragraphs (c) and (d) of item 2.
(4.) In position 1, the height above the deck of sills to the doorways in companionways shall be not less than 1 foot 11½ inches, and, in position 2, they shall not be less than 1 foot 3 inches.
11.—(1.) Ventilators in position 1 or position 2 to spaces below freeboard decks or decks of enclosed superstructures shall have coamings of steel or other equivalent material, substantially constructed and efficiently connected to the deck and, where the coaming of any ventilator exceeds 2 feet 111/2 inches in height, 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.) Ventilator openings shall be provided with efficient weathertight closing appliances, which shall be conveniently stowed near the ventilators to which they are to be fitted.
(4.) Ventilators in position 1 shall have coamings of a height of not less than 2 feet 111/2 inches above the deck and ventilators in position 2 shall have coamings of a height of not less than 2 feet 6 inches above the deck unless, in the case of ventilators in exposed positions, the Minister specifies that the coamings of the ventilators are to have a greater height above the deck, and, if the Minister so directs, the coamings shall have that height.
(5.) Unless the Minister otherwise directs, the last two preceding sub-items do not apply to ventilators in position 1, the coamings of which extend to more than 14 feet 9½ inches above the deck, and in position 2 the coamings of which extend to more than 7 feet 6 inches above the deck.
12.—(1.) 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 and the height from the deck to the point where water may gain access below shall be not less than 2 feet 6 inches on the freeboard deck and 1 foot 5½ inches on the superstructure deck or such lower height as the Minister approves.
(2.) Satisfactory means, permanently attached, shall be provided for closing the openings of the air pipes.
13.—(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, and the number of such openings shall be the minimum compatible with the design and proper working of the ship.
(2.) The lower edge of the openings referred to in this item 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.
14.—(1.) Discharges, scuppers and inlets 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 paragraphs (c) and (d) of item 2 shall be fitted with efficient and accessible means for preventing water from passing inboard, which shall consist of one automatic non-return valve with a positive means of closing it from a position above the freeboard deck in respect of each separate discharge.
(2.) Where the vertical distance from the summer load water line to the inboard end of a discharge pipe referred to in the last preceding sub-item exceeds 1 per centum of the length of the ship, 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.
(3.) Where the vertical distance from the summer load water line to the inboard end of a discharge pipe referred to in sub-item (1.) of this item exceeds 2 per centum of the length, of the ship, the discharge may have a single automatic non-return valve without positive means of closing.
(4.) 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.
(5.) In manned machinery spaces, main and auxiliary sea inlets and discharges in connexion with the operation of machinery may be controlled locally and, if they are controlled locally, the controls shall be readily accessible and provided with indicators showing whether the valves are open or closed.
(6.) Scuppers and discharge pipes originating at any level and penetrating the shell either more than 1 foot 5½ inches below the freeboard deck or less than 1 foot 11½ inches above the summer load waterline shall be provided with a non-return valve at the shell.
(7.) Except in the case of a discharge referred to in sub-items (1.) and (2;) of this item, the requirements in the last preceding sub-item does not apply where the piping is of substantial thickness.
(8.) Scuppers leading from superstructures or deckhouses not fitted with doors complying with the requirements of paragraphs (c) and (d) of item 2 shall be led overboard.
(9.) All valves and shell fittings required by this item shall be of steel, bronze or other approved ductile material and shall not be of ordinary cast iron.
(10.) All pipes to which this item refers shall be of steel or other equivalent material.
15.—(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 centum of the breadth or 1 foot 7½ inches above the load waterline, whichever is the greater distance.
(3.) The side scuttles, together with their glasses, if fitted, and deadlights, shall be of substantial and approved construction.
16.—(1.) Where bulwarks on the weather portions of freeboard decks or a superstructure deck form wells, adequate provision shall be made for rapidly freeing and draining the decks of water.
(2.) For the purposes of this item, adequate provision for rapidly freeing and draining the freeboard deck of water shall be deemed to have been made if there is provided on each side of the ship in each well on that deck a minimum freeing port area ascertained in accordance with the next eight succeeding sub-items.
(3.) Where the sheer in way of the well is standard or greater than standard and the length of the bulwark in the well is 66 feet or less, the minimum freeing port area is an area having the same number of square feet as the number obtained by the formula—
7.6+ 0.115 l.
(4.) Where the sheer in way of the well is standard or greater than standard and the length of the bulwark in the well exceeds 66 feet, the minimum freeing port area is an area having the same number of square feet as the number obtained by the formula—
0.23 l.
(5.) Where the average height of the bulwark exceeds 3 feet 10¼ inches, the area ascertained in accordance with whichever of the last two preceding sub-items is applicable shall be increased by an area having the same number of square feet as the number ascertained in accordance with the formula—
0.04 × l × h1.
(6.) When the average height of the bulwark is less than 3 feet, the area ascertained in accordance with whichever of sub-items (3.) or (4.) of this item is applicable shall be reduced by an area having the same number of square feet as the number ascertained in accordance with the formula—
0.04 × l × h2.
(7.) For the purposes of the last four preceding sub-items—
“l” is the number equal to the number of feet in the length of the bulwark in the well, or if that length exceeds 0.7 times the length of the ship, 0.7 of the length of the ship;
“h1” is the difference in feet between the average height of the bulwark in the well and 3 feet 10¼ inches; and
“h2” is the difference in feet between the average height of the bulwark in the well and 3 feet.
(8.) Where there is no sheer in way of the well, the minimum freeing port area on each side of the ship in each well on the freeboard deck is an area equal to one and one half times the area that would have been applicable under sub-items (3.) to (6.) of this item if the sheer in way of the well had been standard.
(9.) Where the sheer in way of the well is less than standard, the minimum freeing port area on each side of the ship in each well on the freeboard deck is the area calculated in accordance with sub-items (3.) to (6.) of this item increased by a percentage obtained by interpolation between the area so calculated and the area ascertained in accordance with the last preceding sub-item.
(10.) The minimum freeing port area on each side of the ship in each well on a superstructure deck is one half of the area that would have been applicable under the last seven preceding sub-items if that deck had been a freeboard deck.
(11.) Where a ship fitted with a trunk is not fitted with open rails on the weather parts of the freeboard deck in way of the trunk for at least one-half of the length of the rails 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 in accordance with the following Table:
Breadth of hatchway or trunk in relation to the breadth of shin
Area of freeing ports in relation to the total area of the bulwarks
40 per centum or less...........
20 per centum
75 per centum or more..........
10 per centum
Between 40 per centum and 75 per centum
The percentage obtained by linear interpolation
(12.) In ships having superstructures which are open at either or both ends, adequate provision for freeing the space within those superstructures shall be provided.
(13.) The lower edges of the freeing ports shall be as near the deck as practicable, and two-thirds of the freeing port area required shall be provided in the half of the well nearest the lowest point of the sheer curve.
(14.) All openings in the bulwarks referred to in this item shall be protected by rails or bars spaced not less than 9 inches apart and if shutters are fitted to freeing ports, ample clearance shall be provided to prevent jamming; hinges shall have pins or bearings of non-corrodible material, and the securing appliances, if fitted to the shutters, shall be of approved construction.
17—(1.) Deckhouses used for the accommodation of the crew shall be of adequate strength.
(2.) Efficient guard rails, or bulwarks, having a height of not less than 3 feet 3½ inches from the deck or such lesser height as is approved shall be fitted on all exposed parts of the freeboard and superstructure decks.
(3.) The opening below the lowest course of the guard rails shall not exceed 9 inches, the other courses being not more than 1 foot 3 inches apart and, in the case of ships with rounded gunwales, the guard rail supports shall be placed on the fiat of the deck.
(4.) Guard rails, life lines, gangways and underdeck passages shall be provided for the protection of the crew in getting to and from their quarters, the machinery space and all other parts used in the work of the ship.
(5.) 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 being provided above the deck cargo if there is no convenient passage on or below the deck of the ship.
18.—(1.) The bow height of the ship, that is to say, the vertical distance at the forward perpendicular between—
(a) the waterline corresponding to the assigned summer load waterline with the ship at the designed trim; and
(b) the top of the exposed deck at side,
shall not be less than—
(c) in the case of a ship less than 820 feet in length—
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inches; and
(d) in the case of a ship of 820 feet or more in length—
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(2.) For the purposes of the last preceding item—
l is the number of feet in the length of the ship;
Cb is the block coefficient which is to be taken as not less than 0.68.
(3.) The bow height of a ship shall not be obtained by sheer unless the sheer extends for at least 0.15 per centum of the length of the ship measured from the forward perpendicular.
(4.) The height of a superstructure fitted to a ship shall not be used in calculating the bow height of the ship unless the superstructure extends from the stem to a point at least 0.07 per centum of the length of the ship abaft the forward perpendicular and the superstructure—
(a) is enclosed in accordance with the requirements of paragraphs (c), (d) and (e) of item 2; or
(b) is fitted with closing appliances approved by the assigning authority.
A deduction for excess sheer calculated in accordance with rules 65 and 67 of the Load Line Rules shall not be made unless an enclosed midship superstructure is fitted.
Exposed hatchways on the freeboard deck and on the forecastle deck and on the top of expansion trunks in a Type A ship shall be fitted with effective water-tight covers of steel or other equivalent material and exposed hatchways in any other position shall be weathertight.
21.—(1.) Machinery casings on Type A ships shall be protected by an enclosed poop or bridge of at least standard height, or by a deckhouse of equal height and equivalent strength, but machinery casings may be exposed if there are no openings giving direct access from the freeboard deck to the machinery space and a door complying with the requirements of paragraphs (c) and (d) of item 2 may be permitted in the machinery casing if the door leads to a space or passageway which is as strongly constructed as the casing and is separated from the stairway to the engine room by a second weathertight door of steel or other equivalent material.
(2.) If a Type A ship is fitted with a midship bridge or deckhouse, an efficiently constructed fore and aft permanent gangway of sufficient strength shall be fitted at the level of the superstructure deck between the poop and the midship bridge or deckhouse, or equivalent means of access shall be provided to carry out the purpose of such gangway.
(3.) If a Type A ship is not fitted with a midship bridge or deckhouse, arrangements shall be provided to safeguard the crew in reaching all parts used in the working of the ship.
(4.) Safe and satisfactory access from the gangway level shall be available between different parts of the crew accommodation and between crew accommodation and the machinery space.
(5.) Type A ships with bulwarks shall have open rails fitted for at least half the length of the exposed parts of the weather deck or other effective freeing arrangements, and the upper edge of the sheer strake shall be kept as low as practicable.
(6.) Where superstructures are connected by trunks, open rails shall be fitted for the whole length of the exposed parts of the freeboard deck.
PART II.—DAMAGED STABILITY AND SUB-DIVISION CRITERIA FOR TYPE A SHIPS
A Type A ship shall be assigned such a freeboard that, if, when loaded to the corresponding summer load waterline with some compartments full and the remaining compartments empty or partly filled and one of the empty or partly filled compartments is flooded at an assumed permeability of 0.95, it will remain afloat in a condition of equilibrium.
For the purposes of the last preceding item, the ship shall be deemed to remain afloat in a condition of equilibrium if when flooded to the extent referred to in the last preceding item—
(a) the final waterline is below the lower edge of any opening through which progressive flooding may take place;
(b) the maximum angle of heel due to unsymmetrical flooding does not exceed 15°; and
(c) the metacentric height in the flooded condition is positive.
24. For the purposes of item 2, if the length of the ship is over 738 feet, the machinery space of the ship shall be regarded as a floodable compartment with an assumed permeability of 0.85.
PART I.—CONDITIONS OF ASSIGNMENT OF, AND REDUCTIONS IN FREEBOARDS, FOR SPECIAL STEAMERS, OTHER THAN TYPE B SHIPS.
In this Part—
(a) a reference to an item by number is a reference to the item so numbered in this Part; and
(b) a reference to an ore carrier, an ore-oil combination carrier or a bulk carrier is a reference to such a carrier that is over 300 feet in length but not over 600 feet in length.
The conditions of assignment of freeboards for an ore carrier are that—
(a) the main cargo hatchways shall be closed by watertight steel hatch covers the strength of which is not less than the strength calculated in accordance with the formulas—
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where
x is the section modulus (in inches taken to the third power) of the stiffeners, including plating;
l is the number of feet in the unsupported span of the stiffeners;
S is the number of feet in the spacing of the stiffeners;
y is the moment of inertia of the stiffeners (including plating), in inches taken to the fourth power;
z is the number of inches in the thickness of the plating; and
a is the number of inches in the spacing of the stiffeners.
(b) any wing hatchways to side compartments shall not exceed the size of wing hatchways in a tanker and shall have well rounded corners;
(c) all deck openings shall be so disposed as to reduce stress concentrations;
(d) longitudinal watertight bulkheads shall be fitted on the port and starboard sides over the range of the cargo holds, each of which shall be fitted at a distance from the centre plane of the ship not greater than thirty per centum of the midship moulded breadth of the ship;
(e) transverse watertight bulkheads shall be fitted in the side compartments abreast of the longitudinal bulkheads each spaced not more than
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(f) the ship shall be fitted with a double bottom under the central compartment, the height of which is at least equal to the height required for a double bottom under the central compartment in a steamer having the same length, breadth, draught and depth as the shin.
The conditions of assignment of freeboards for an ore-oil combination carrier are that—
(a) the carrier complies with the conditions specified in item 2;
(b) the structural strength of the carrier is sufficient to enable it to carry dry and liquid cargoes; and
(c) bulkheads bounding spaces in which cargo oil is to be carried shall be oiltight.
Subject to item 5, the freeboard to be assigned to an ore carrier that complies with the conditions of assignment specified in item 2 or to an ore-oil combination carrier that complies with the conditions of assignment specified in the last preceding item is the freeboard that would be assigned to a steamer of the same length under the Load Line Rules reduced by one-half of the reduction in the steamer freeboard that would be allowed to a tanker of the same length and arrangements as the carrier.
Where an ore carrier or an ore-oil combination carrier complies with the conditions of assignment specified in item 2 or item 3, as the case may be, and, in addition, the central cargo compartment of the carrier is so sub-divided by transverse watertight bulkheads that the freeboard deck will not be submerged in the event of any one of the central compartments so formed being completely filled with salt water (assuming a permeability of 60 per centum) with the ship floating at the deepest allowable draft in salt water, the freeboard to be assigned to the carrier is the freeboard that would be assigned to a steamer of the same length under the Load Line Rules reduced by the full amount of the reduction in the steamer freeboard that would be allowable to a tanker of the same length and arrangements as the carrier.
The conditions of assignment of freeboards for a bulk carrier are that—
(a) the longitudinal strength of the carrier is sufficient to withstand the draft for the ship;
(b) the transverse bulkheads and framing have been strengthened;
(c) the carrier can achieve a unity standard of sub-division throughout the hold length, assuming a permeability of 95 per centum; and
(d) the main cargo hatchways shall be closed by watertight steel hatch covers the strength of which is not less than that ascertained in accordance with formulas specified in paragraph (a) of item 2.
The freeboard to be assigned to a bulk carrier that complies with the conditions of assignment referred to in the last preceding item is the freeboard that would be assigned to a steamer of the same length reduced by the full amount of the reduction in the steamer freeboard that would be allowed under the Load Line Rules to a tanker of the same length and arrangements as the bulk carrier.
PART II.—CONDITIONS OF ASSIGNMENT OF FREEBOARDS, AND REDUCTION IN FREEBOARDS FOR SPECIAL STEAMERS, BEING TYPE B SHIPS.
1.—(1.) The conditions of assignment of freeboards for a Type B ship are that—
(a) the ship complies with the requirements with which a Type A ship is, by items 1 to 18 (inclusive) and item 20 of the Fifth Schedule to these Regulations, required to comply;
(b) the ship, if not more than 738 feet in length, when loaded to the corresponding summer load waterline and after flooding any single damaged compartment (except the machinery space) at an assumed permeability of 0.95 will remain afloat in a condition of equilibrium; and
(c) the ship, if over 738 feet in length, when loaded to the corresponding summer load waterline and after flooding in a single damaged compartment, at an assumed permeability of 0.95 for all spaces other than the machinery space and at an assumed permeability of 0.85 for the machinery space, will remain afloat in a condition of equilibrium.
(2.) For the purpose of the last preceding sub-item, the ship shall be deemed to remain afloat in a condition of equilibrium if when flooded to the extent referred to in that sub-item—
(a) the final waterline is below the lower edge of any opening through which flooding may take place;
(b) the maximum angle of heel due to unsymmetrical flooding does not exceed fifteen degrees; and
(c) the metacentric height in the flooded condition is positive.
The calculations for a freeboard to be assigned under this Part for a Type B ship shall be based upon the following assumptions:—
(a) that the vertical extent of the damage is equal to the depth of the ship;
(b) that the penetration of damage does not exceed one-fifth of the breadth of the ship at the load waterline;
(c) that no main transverse bulkhead is damaged; and
(d) that the height of the centre of gravity above the base line is assessed allowing for homogeneous loading of cargo holds and allowing for 50 per centum of the designed capacity of the ship for consumable fluids and stores.
The freeboard to be assigned for a Type B ship that complies with the conditions of assignment set out in item 1 of this Part shall be computed from the table in item 8 of this Part for a ship of the length of the Type B ship, and the freeboard to be so assigned for such a ship shall, in the case of a Type B ship that complies with the conditions specified in item 4, 5 or 6 of this Part, be a freeboard that is less than the freeboard computed from the table in item 8 of this Part for a ship of the length of the Type B ship and is not less than the freeboard computed from the table in Part III. of the Fifth Schedule to these Regulations for a ship of the length of the Type B ship.
4.—(1.) In assigning a freeboard for a Type B ship under this Part, the freeboard so assigned shall not be a freeboard that includes a reduction of more than 60 per centum of the difference between the freeboard specified in the table in item 8 of this Part for a ship of the length of the Type B ship and the freeboard specified in the table in Part III. of the Fifth Schedule to these Regulations for a ship of that length unless—
(a) the ship complies with the requirements with which a Type A ship is, by item 21 in the Fifth Schedule to these Regulations, required to comply;
(b) the ship, when loaded to the corresponding summer load waterline and after flooding any two adjacent fore and aft compartments (not being machinery spaces) at an assumed permeability of 0.95, will remain afloat in a condition of equilibrium; and
(c) the ship, if more than 738 feet in length, when loaded to the summer load waterline and after flooding the machinery space only, at an assumed permeability of 0.85, remains afloat in a condition of equilibrium.
(2.) For the purposes of the last preceding sub-item, a ship shall be deemed to remain afloat in a condition of equilibrium if when flooded to the extent referred to in the last preceding sub-item the results specified in paragraphs (a), (b) and (c) of sub-item (2.) of item 1 of this Part are satisfied.
Where under the preceding provisions of this Part, the calculation of the freeboard to be assigned to a Type B ship results in a freeboard that includes a reduction of not more than 60 per centum of the difference between the freeboard specified in the table in item 8 of this Part for a ship having the length of the Type B ship and the freeboard specified in the table in Part III. of the Fifth Schedule to these Regulations for a ship having that length, the reduction shall only be allowed if the strength of the hatch covers is increased by 10 per centum over the strength specified in item 8 of the Fifth Schedule to these Regulations.
Where under the preceding provisions of this Part, the calculation of the freeboard to be assigned to a Type B ship results in a freeboard that includes a reduction of more than 60 per centum of the difference between the freeboard specified in the table in item 8 of this Part for a ship having the length of the Type B ship and the freeboard specified in the table in Part III. of the Fifth Schedule to these Regulations for a ship having that length, the reduction shall only be allowed if the strength of the hatch covers is increased by 20 per centum over the strength specified in item 8 of the Fifth Schedule to these Regulations.
7.—(1.) Where a Type B ship is fitted with superstructures and trunks that are less in length than the length of the ship, the deduction to be allowed for excess sheer shall, subject to the succeeding items of this item, be reduced by the appropriate percentage referred to in the following table:—
(2.) Where the length of the superstructures and trunks is a length intermediate between the lengths specified in the table in the last preceding item, the appropriate percentage by which the deduction to be allowed for excess sheer shall be reduced shall be obtained by linear interpolation.
(3.) Where the length of a forecastle fitted to a Type B ship is less than 0.07 per centum of the length of the ship, the appropriate percentage by which the deduction to be allowed for excess sheer is to be reduced under the preceding provisions of this item shall be further reduced by a percentage obtained by the formula—
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(4.) In this item—
l is the length of the ship; and
f is the length of the forecastle.
8. The freeboard table for Type B ships is the following table:—
7.—(1.) Where an application was, before the commencement of these Regulations, made under the Navigation (Load Lines) Regulations for the assignment of load lines for a Type A ship or for a special steamer and the ship complies with the requirements of the Navigation (Load Lines) Regulations, as amended by these Regulations, load lines may be assigned to such a ship as if the application had been made after the date of commencement of these Regulations.
(2.) In this regulation “Type A ship” and “special steamer” have the same meanings as in the Navigation (Load Lines) Regulations as amended by these Regulations.
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By Authority: A. J. Arthur, Commonwealth Government Printer, Canberra