International convention on load lines, 1966

SUPPLEMENT relating to theON LOAD LINES, 1966 containing Amendments adopted by the Assembly of the International Maritime Organization Regulation equivalent to Regulation 27 Unified inte

SUPPLEMENT relating to the

ON LOAD LINES, 1966

containing Amendments adopted by the Assembly

of the International Maritime Organization

Regulation equivalent to Regulation 27

Unified interpretations of the Regulations of the Convention Form of Record of Conditions of Assignment of Load Lines

Published in 1981

by the INTERNATIONAL MARITIME ORGANIZATION

4 Albert Embankment, London SEI 7SR

First edition 1981

Printed by the International Maritime Organization, London

26 28 30 29 27ISBN 92-801-1114-0

IMO PUBLICATIONSales number: IMO-705E

Copyright ©IMO 1981

NOTE: The name of the Organization as it appears in this publication was changed to

FOREWORD

This Supplement contains:

1 Amendments to the International Convention on Load Lines, 1966, adopted

by the IMCO Assembly at its seventh, ninth and eleventh sessions, by tions A.231(VII), A.319(IX) and A.4ll(XI) in 1971, 1975 and 1979 respectively

resolu-In accordance with Article 29(3) of the Convention, the amendments willcome into force twelve months after the date on which they are accepted by two-thirds of the Contracting Governments At the time of printing, none of theseamendments has received the necessary number of acceptances

2 A Regulation equivalent to Regulation 27 of the International Convention onLoad Lines, 1966, adopted by the IMCO Assembly at its ninth session by resol-tion A.320(lX)

resolu-tion A.172(ES.IV) The Assembly recommends Governments concerned to acceptthe application of this equivalent Regulation under Article 8 of the Convention

3 Unified interpretations of the International Convention on Load Lines, 1966,approved by the Maritime Safety Committee at its thirty-fourth and thirty-sixthsessions (LL.3/Circ.20 and LL.3/Circ.22)

Many of these interpretations originated from the International Association

of Classification Societies (lACS) The Maritime Safety Committee agreed that they

~hould also be considered as IMCO interpretations Further interpretations are stillunder consideration by the Organization

4 Form of Record of Conditions of Assignment of Load Lines, accepted by theMaritime Safety Committee at its thirty-fourth session

The Committee invited Administrations to supply as soon as possible everyship under their jurisdiction with a suitable record of freeboard assignment bearing

in mind that:

.1 the record should contain matter which is relevant only to the tion of assignment However, where appropriate, the information in therecord could be supplemented, or certain items substituted by sketches

condi-or extracts of plans of a size consistent with that of the record,provided such material is referred to in the 'relevant space of the basicdocument;

.2 although every vessel subject to an International Load Line Certificateshould be provided with a record of particulars, the standardized formneed be completed only in respect of ships put into service after theadoption of the standard form by the Administration concerned and toships which do not already possess some form of record approved bythat Administration;

.3 in the case of ships to which the 1930 Convention free boards werereassigned under the terms of Article 4(4)"of the 1966 Load LineConvention and where the standard form devised in relation to the

1966 Convention requirements may not be entirely suitable, theAdministration should be satisfied that the record of particulars pro-vided on board such ships is adequate

Page

Amendments to the International Convention on

Load Lines, 1966, adopted by the IMCO Assembly, in

Regulation equivalent to Regulation 27 of the

International Convention on Load Lines, 1966,

adopted by the 1MCO Assembly in November 1975

Unified interpretations of the Regulations of the

Form of record of conditions of assignment of load lines 35

ON LOAD LINES, 1966Adopted by the IMCO Assembly on 12 October 1971

at its seventh session (resolution A.23 I (VII))

Article 5(2)(c)Replace the words "Punta Norte" by "Punta Rasa (Cabo San Antonio)".Regulation I

Replace the heading by "Strength of Ship" and the word "hull" in the first

sentence by "ship"

Regulation 3( 5)(b )Replace the words "the moulded lines of the deck and side shell plating" by

"the moulded lines of deck and sides"

Regulation 37(2)

In the footnote to tables for both Type 'A' and Type 'B' ships, insert after

"superstructures" the words "and trunks"

In the last sentence replace the words "the superstructure" by "a

super-structure other than a raised quarter deck"

Regulation 45(5)

Add after "waterline" the words "or with Regulation 40(8) based on the

summer timber draught measured from the top of the keel to the summer timber

load line"

Regulation 46(1 )(b)

Replace the last sentence by the following:

"Excluded from this zone are the North Atlantic Winter Seasonal Zone I, the North

Atlantic Winter Seasonal Area and the Baltic Sea bounded by the parallel of

lati-tude of the Skaw in the Skagerrak The Shetland Islands are to be considered as

being on the boundary of the North Atlantic Winter Seasonal Zones I and n.

Seasonal periods:

SUMMER: I April to 31 October"

Regulation 47

Insert after the first sentence (i.e the sentence which ends with the words

"the west coast of the American continent") the following:

"Valparaiso is to be considered as being on the boundary line of the Summer

and Winter Seasonal Zones"

•Chart of Zones and Seasonal Areas

Replace the words "SEASONAL WINTER ZONE" where they indicate the

area along the eastern coast of USA by "WINTER SEASONAL AREA"

Replace the words "SEASONAL WINTER ZONE" wherever they appear in

the chart (except those mentioned above) by "WINTER SEASONAL ZONE" and

also "SEASONAL TROPICAL" by "SEASONAL TROPICAL AREA"

In the note replace the word "western" by "eastern" and insert the words

"(328 feet)" after" 100 metres"

ON LOAD LINES, 1966Adopted by the IMCO Assembly on 12 November 1975

at its ninth session (resolution A.319(IX»

The present Article 29 should be replaced by the following:

"Article 29

Amendments

(1) The present Convention may be amended by either of the procedures specified

in the following paragraphs

(2) Amendments after consideration within the Organization:

(a) Any amendment proposed by a Contracting Government shall be submitted

to the Secretary-General of the Organization, who shall then circulate it toall Members of the Organization and all Contracting Governments at leastsix months prior to its consideration

(b) Any amendment proposed and circulated as above shall be referred to theMaritime Safety Committee of the Organization for consideration

(c) Contracting Governments of States, whether or not Members of theOrganization, shall be entitled to participate in the proceedings of theMaritime Safety Committee for the consideration and adoption of amend-ments

(d) Amendments shall be adopted by a two-thirds majority of the ContractingGovernments present and voting in the Maritime Safety Committeeexpanded as provided for in sub-paragraph (c) of this paragraph (herein-after referred to as "the expanded Maritime Safety Committee") on condi-tion that at least one-third of the Contracting Governments shall bepresent at the time of voting

(e) Amendments adopted in accordance with sub-paragraph (d) of this graph shall be communicated by the Secretary-General of the Organization

para-to all Contracting Governments for acceptance

(f) (i) An amendment to an Article of the Convention shall be deemed to

have been accepted on the date on which it is accepted by two-thirds

of the Contracting Governments

(ii) An amendment to an Annex shall be deemed to have been accepted:

at the end of two years from the date on which it is cated to Contracting Governments for acceptance; or

communi-at the end of a different period, which shall not be less thanone year, if so determined at the time of its adoption by a two-thirds majority of the Contracting Governments present andvoting in the expanded Maritime Safety €ommittee

However, if within the specified period either more than one-third ofContracting Governments, or Contracting Governments the combinedmerchant fleets of which constitute not less than fifty per cent of the

gross tonnage of all the merchant fleets of all Contracting

Govern-ments, notify the Secretary-General of the Organization that they

object to the amendment, it shall be deemed not to have been

accepted

(g) (i) An amendment to an Article of the Convention shall enter into force

with respect to those Contracting Governments which have accepted

it, six months after the date on which it is deemed to have been

accepted, and with respect to each Contracting Government which

accepts it after that date, six months after the date of that

Con-tracting Government's acceptance

(ii) An amendment to an Annex shall enter into force with respect to all

Contracting Governments, except those which have objected to the

amendment under sub-paragraph (f)(ii) of this paragraph and which

have not withdrawn such objections, six months after the date on

which it is deemed to have been accepted However, before the date

set for entry into force, any Contracting Government may give notice

to the Secretary-General of the Organization that it exempts itself

from giving effect to that amendment for a period not longer than

one year from the date of its entry into force, or for such longer

period as may be determined by a two-thirds majority of the

Con-tracting Governments present and voting in the expanded Maritime

Safety Committee at the time of the adoption of the amendment

(3) Amendment by a Conference:

(a) Upon the request of a Contracting Government concurred in by at least

one-third of the Contracting Governments, the Organization shall convene

a Conference of Contracting Governments to consider amendments to the

present Convention

(b) Every amendment adopted by such a Conference by a two-thirds majority

of the Contracting Governments present and voting shall be communicated

by the Secretary-General of the Organization to all Contracting

Govern-ments for acceptance

(c) Unless the Conference decides otherwise, the amendment shall be deemed

to have been accepted and shall enter into force in accordance with the

procedures specified in sub-paragraphs (2)(f) and (2)(g) respectively of this

Article, provided that references in these paragraphs to the expanded

Maritime Safety Committee shall be taken to mean references to the

Con-ference

"

Annex which has entered into force shall not be obliged to extend the

benefit of the present Convention in respect of the certificates issued to a

ship entitled to fly the flag of a State the Government of which, pursuant

to the provisions of sub-paragraph (2)(f)(ii) of this Article, has objected to

the amendment and has not withdrawn such an objection, but only to the

extent that such certificates relate to matters covered by the amendment

in question

Annex which has entered into force shall extend the benefit of the present

Convention in respect of the certificates issued to a ship entitled to fly the

flag of a State the Government of which, pursuant to the provisions ofsub-paragraph (2){g){ii) of this Article, has notified the Secretary-General

of the Organization that it exempts itself from giving effect to the ment

amend-(5) Unless expressly provided otherwise, any amendment tc the present tion made under this Article, which relates to the structure of a ship, shallapply only to ships the keels of which are laid or which are at a similar stage ofconstruction, on or after the date on which the amendment enters into force.(6) Any declaration of acceptance of, or objection to, an amendment or anynotice given under sub-paragraph (2)(g)(ii) of this Article shall be submitted inwriting to the Secretary-General of the Organization, who shall inform all Con-tracting Governments of any such submission and the date of its receipt.(7) The Secretary-General of the Organization shall inform all Contracting Govern-ments of any amendments which enter into force under this Article, togetherwith the date on which each such amendment enters into force."

Conven-AMENDMENT TO THE INTERNATIONAL CONVENTION

ON LOAD LINES, 1966Adopted by the IMCa Assembly on 15 November 1979

at its eleventh session (resolution A.4II(XI))

Regulation 49(4)(b)

Delete "to longitude 1200E and thence the meridian of longitude 1200E tothe coast of Australia" and replace by "to longitude l14°E and thence the meridian

of longitude 114° E to the coast of Australia"

Chart of zones and seasonal areas

Move the border line of the seasonal tropical area at the coast of Australiafrom longitude 1200E to longitude lI4°E

REGULATION EQUIVALENT TO REGULATION 27 OF THE

Adopted by the IMCa Assembly on 12 November 1975

at its ninth session (resolution A.320(IX))

Types of Ships

(1) For the purposes of freeboard computation, ships shall be divided into Type 'A'and Type 'B'

Type 'A ' Ships

(2) A Type 'A' ship is one which:

(a) is designed to carry only liquid cargoes in bulk;

(b) has a high integrity of the exposed deck with only small access openings tocargo compartments, closed by watertight gasketed covers of steel or equi-valent material; and

(c) has low permeability ofloaded cargo compartments

(3) A Type 'A' ship, if over 150 metres (492 feet) in length to which a freeboardless than Type 'B' has been assigned, when loaded to its summer load water-line,shall be able to withstand the flooding of any compartment or compartments,with an assumed permeability of 0.95, consequent upon the damage assump-tions specified in paragraph (12) of this Regulation, and shall remain afloat in asatisfactory condition of equilibrium as specified in paragraph (13) of thisRegulation In such a ship, if over 225 metres (738 feet) in length, themachinery space shall be treated as a floodable compartment, but with apermeability of 0.85

(4) A Type 'A' ship shall be assigned a freeboard not less than that based onTable A of Regulation 28

(5) All ships which do not come within the provisions regarding Type 'A' ships inparagraphs (2) and (3) of this Regulation shall be considered as Type 'B' ships.(6) Type 'B' ships, which in position 1 have hatchways fitted with hatch coverswhich comply with the requirements of Regulation 15, other than para-graph (7), shall be assigned free boards based upon the values gi'len in Table B

of Regulation 28, increased by the values given in the following table:

'"

Freeboard increase over tabular freeboard for Type 'B'ships,

for ships with hatch covers not complying with Regulation 15(7} or 16

Length of Freeboard Length of Freeboard Length of Freeboard

(metres) (milli- (metres) (milli- (metres)

Freeboards at intermediate lengths of ship shall be obtained by linear interpolation

Ships above 200 metres in length shall be dealt with by the Administration

Freeboard increase over tabular freeboard for Type 'B' ships, for ships with hatch covers not complying with Regulation 15(7} or 16

(8) Any Type 'B' ship of over 100 metres (328 feet) in length may be assignedfreeboards less than those required under paragraph (7) of this Regulation,provided that, in relation to the amount of reduction granted, the Administra-tion is satisfied that:

(a) the measures provided for the protection of the ~rew are adequate;

(b) the freeing arrangements are adequate;

(c) the covers in positions 1 and 2 comply with the provisions of tion 16 and have adequate strength, special care being given to their sealingand securing arrangements; and

Regula-(d) the ship, when loaded to its summer load water-line, shall be able to stand the flooding of any compartment or compartments, with an assumedpermeability of 0.95, consequent upon the damage assumptions specified

with-in paragraph (12) of this Regulation, and shallAremain afloat in a factory condition of equilibrium as specified in paragraph (13) of thisRegulation In such a ship, if over 225 metres (738 feet) in length, themachinery space shall be treated as a floodable compartment, but with apermeability of 0.85

satis-(9) In calculating the free boards for Type 'B' ships which comply with the

requirements of paragraphs (8), (11), (12) and (13) of this Regulation, the

values from Table B of Regulation 28 shall not be reduced by more than

60 per cent of the difference between the 'B' and 'A' tabular values for the

appropriate ship lengths

(10) (a) The reduction in tabular freeboard allowed under paragraph (9) of this

Regulation may be increased up to the total difference between the

values in Table A and those in Table B of Regulation 28 on condition

that the ship complies with the requirements of:

(i) Regulation 26 other than paragraph (4) as ifit were a Type 'A' ship;

(ii) paragraphs (8), (11) and (13) of this Regulation; and

(iii) paragraph (12) of this Regulation, provided that throughout the

length of the ship anyone transverse bulkhead will be assumed to

be damaged, such that two adjacent fore and aft compartmentsshall be flooded simultaneously, except that such damage will notapply to the boundary bulkheads of a machinery space

(b) In such a ship, if over 225 metres (738 feet) in length, the machinery

space shall be treated as a flood able compartment, but with a

permea-bility of 0.85

Initial Condition of Loading

(11) The initial condition ofloading before flooding shall be determined as follows:

(a) The ship is loaded to its summer load water-line on an imaginery even

keel

(b) When calculating the vertical centre of gravity, the following principles

apply:

(i) Homogeneous cargo is carried

(ii) All cargo compartments, except those referred to under (iii) of this

sub-paragraph, but including compartments intended to be partiallyfilled, shall be considered fully loaded except that in the case offluid cargoes each compartment shall be treated as 98 per cent full

(iii) If the ship is intended to operate at its summer load water-line with

empty compartments, such compartments shall be consideredempty provided the height of the centre of gravity so calculated is

not less than as calculated under (ii) of this sub-paragraph

(iv) Fifty per cent of the individual total capacity of all tanks and

spaces fitted to contain consumable liquids and stores is allowed

for It shall be assumed that for each type of liquid, at least one

transverse pair or a single centre line tank has maximum free

surface, and the tank or combination of tanks to be taken into

account shall be those where the effect of free surfaces is the

greatest; in each tank the centre of gravity of the contents shall be

taken at the centre of volume of the tank The remaining tanks

shall be assumed either completely empty or completely filled, and

the distribution of consumable liquids between these tanks shall be

effected so as to obtain the greatest possible height above the keel

for the cen tre of gravity

(v) At an angle of heel of not more than 5 degrees in each ment containing liquids, as prescribed in (ii) of this sub-paragraphexcept that in the case of compartments containing consumablefluids, as prescribed in (iv) of this sub-paragraph of this paragraph,the maximum free surface effect shall be taken into account.Alternatively, the actual free surface effects may be used, providedthe methods of calculation are acceptable to the Administration.(vi) Weights shall be calculated on the basis of the following values forspecific gravities:

(c) If damage of a lesser extent than specified in sub-paragraphs ( a) and (b)

of this paragraph results in a more severe condition, such lesser extentshall be assumed

(d) Except where otherwise required by paragraph (10)(a) the flooding shall

be confined to a single compartment between adjacent transverse heads provided the inner longitudinal boundary of the compartment isnot in a position within the transverse extent of assumed damage Trans-verse boundary bulkheads of wing tanks, which do not extend over thefull breadth of the ship shall be assumed not to be damaged, providedthey extend beyond the transverse extent of.assumed damage prescribed

bulk-in sub-paragraph (b) of this paragraph

If in a transverse bulkhead there are steps or recesses of not more than3.05 metres (10 feet) in length located within the transverse extent ofassumed damage as defined in sub-paragraph (b) of this paragraph, suchtransverse bulkhead may be considered intact and the adjacent com-partment may be floodable singly If, however, within the transverseextent of assumed damage there is a step or recess of more than3.05 metres (10 feet) in length in a transverse bulkhead, the two com-partments adjacent to this bulkhead shall be lOonsidered as flooded Thestep formed by the after peak bulkhead and the after peak tank top shallnot be regarded as a step for the purpose of this Regulation

(e) Where a main transverse bulkhead is located within the transverse extent

of assumed damage and is stepped in way of a double bottom or side

tank by more than 3.05 metres (10 feet), the double bottom or side

tanks adjacent to the stepped portion of the main transverse bulkhead

shall be considered as flooded simultaneously If this side tank has

openings into one or several holds, such as grain feeding holes, such hold

or holds shall be considered as flooded simultaneously Similarly in a ship

designed for the carriage of fluid cargoes, if a side tank has openings into

adjacent compartments, such adjacent compartments shall be considered

as empty and flooded simultaneously This provision is applicable even

where such openings are fitted with closing appliances, except in the case

of sluice valves fitted in bulkheads between tanks and where the valves

are controlled from the deck Manhole covers with closely-spaced belts

are considered equivalent to the unpierced bulkhead except in the case of

openings in topside tanks making the topside tanks common to the

holds

(f) Where the flooding of any two adjacent fore and aft compartments

is envisaged main transverse watertight bulkheads shall be spaced at least

1/3L2/3 or 14.5 metres (0.495L2/3 or 47.6 feet), whichever is the lesser,

in order to be considered effective Where transverse bulkheads are

spaced at a lesser distance, one or more of these bulkheads shall be

assumed as non-existent in order to achieve the minimum spacing

between bulkheads

Condition of Equilibrium

(13) The condition of equilibrium after flooding shall be regarded as satisfactory

provided:

(a) The final water-line after flooding, taking into account sinkage, heel, and

trim, is below the lower edge of any opening through which progressive

flooding may take place Such openings shall include air pipes, ventilators

and openings which are closed by means of weathertight doors (even if

they comply with Regulation 12) or hatch covers (even if they comply

with Regulation 16 or Regulation 19(4)), and may exclude those

openings closed by means of manhole covers and flush scuttles (which

comply with Regulation 18), cargo hatch covers of the type described in

Regulation 27(2), hinged watertight doors in an approved position which

are secured closed while at sea and so logged, remotely operated sliding

watertight doors, and side scuttles of the non-opening type (which

comply with Regulation 23)

(b) If pipes, ducts or tunnels are situated within the assumed extent of

damage penetration as defined in paragraph 12(b) of this Regulation,

arrangements are to be made so that progressive flooding cannot thereby

extend to compartments other than those assumed to be floodable in the

calculation for each case of damage

(c) The angle of heel due to unsymmetrical flooding does not exceed

15 degrees If no part of the deck is LTJ1mersed,an angle of heel of up to

17 degrees may be accepted

(d) The metacentric height in the flooded condition is positive

(e) When any part of the deck outside the compartment assumed flooded in

a particular case of damage is immersed, or in any case where the margin

of stability in the flooded condition may be considered doubtful, theresidual stability is to be investigated It may be regarded as sufficient ifthe righting lever curve has a minimum range of 20 degrees beyond theposition of equilibrium with a maximum righting lever of at least0.1 metre (4 inches) within this range The area under the righting levercurve within this range shall be not less than 0.0175 metre-radians(0.689 inch-radians) The Administration shall give consideration to thepotential hazard presented by protected or unprotected openings whichmay become temporarily immersed within the range of residual stability.(f) The Administration is satisfied that the stability is sufficient during inter-mediate stages of flooding

Ships without means of Propulsion

(14) A lighter, barge, or other ship without independent means of propulsion shall

be assigned a freeboard in accordance with the provisions of these tions Barges which meet the requirements of paragraphs (2) and (3) of thisRegulation may be assigned Type 'A' freeboards:

Regula-(a) The Administration should especially consider the stability of bargeswith cargo on the weather deck Deck cargo can only be carried onbarges to which the ordinary Type 'B' freeboard is assigned

(b) However, in the case of barges which are unmanned, the requirements ofRegulations 25,26(2) and (3), and 39 shall not apply

(c) Such unmanned barges which have on the freeboard deck only smallaccess openings closed by watertight gasketed covers of steel or equi-valent material may be assigned a freeboard 25 per cent less than thosecalculated in accordance with these Regulations

UNIFIED INTERPRETATIONS OF THEREGULA TIONS OF THE CONVENTION

In applying the Articles and Regulations of the 1966 Load Line Convention,the following interpretations are recommended to Contracting Governments inorder to ensure the uniform application of the relevant Articles and Regulations

Application (Article 4(4))

(lACS interpretation LL.l)

Even where the increase in draught is only of the order of 25 mm or 50 mmthere should be no relaxation from the condition that existing ships comply with allthe requirements

Form of Certificates (Article 18)

(lACS interpretation LL.19)

The model form of certificates given in Annex III of the Load Line tion should be strictly adhered to and any deviations from this pattern should beavoided

Conven-Depth for Freeboard (Regulation 3(6))

(lACS interpretation LL.2)

The correction for thickness of sheathing on the exposed freeboard deck,

super-structures In other cases the correction should be J-t- where Q = length ofsheathed area which extends from side to side Only wood sheathing should beconsidered

Superstructure (Regulation 3( 1O)(b))

(lACS interpretation LL.3)

A bridge or poop should not be regarded as enclosed unless access is providedfor the crew starting from any point on the uppermost complete exposed deck orhigher to reach machinery and other working spaces inside these superstructures byalternative means which are available at all times when bulkhead openings areclosed •

Details of Marking (Regulation 8)

(lACS interpretation LLA)

"Permanently marked" is considered to include welding of the marks on thesides of the ship provided the usual precautions as to material, electrodes etc areobserved

(lACS interpretation LL.5)

Doors should generally open outwards to provide additional security againstthe impact of the sea Doors which open inwards should be exceptionally approved

Portable sills should be avoided However, in order to facilitate the loadingf

unloading of heavy or bulky spare parts, portable sills may be fitted on the

following conditions:

(1) that they are installed before the ship leaves port;

(2) that they are gasketed and fastened by closely spaced through bolts

Whenever the sills are replaced after removal, the weathertightness of the sills

and related doors should be verified by hose testing The dates of removal, replacing

and hose testing should be recorded in the ship's log-book

Hatch beams and cover stiffeners ofvariable cross section (Regulations 15(4), 15(5),

15(6),15(7) and 16)

(lACS interpretation LL.20)

To avoid stresses and deflections exceeding those given in the above

Regula-tions along construction elements of variable cross section, the required section

modulus calculated as for construction elements of constant cross section should be

increased by a factor K expressed by:

Hatchways closed by weathertight covers of steel or other equivalent material fittedwith gaskets and clamping devices (Regulations 16 and 27(7)(c»

(lACS interpretation LL.6)

Regulation 16:

Where hatchways are fitted with coarnings of standard height, no extrastrengthening (beyond what is required in the Load Line Convention) should berequired for covers loaded with cargo, even dense cargo, provided the load does notexceed 1.75 tonsfm2 (in position I)

Regulation 27(7)(c):

No extra strengthening is recommended for hatchway covers on vessels whichare assigned freeboards less than those based on Table B, except for flush hatchwaycovers which are fitted on the freeboard deck forward of the quarter length, inwhich case the section modulus and the moment of inertia should be increased

15 per cent over that required by Regulation 16

Machinery Space Openings (Regulation 17(1»

(lACS interpretation LL.7)Where casings are not protected by other structures, double doors should berequired for ships assigned freeboards less than those based on Table B An inner sill

of 230 millimetres in conjunction with the outer sill of 600 millimetres is mended

recom-Miscellaneous Openings in Freeboard and Superstructure Decks (Regulation 18(2)and 18(3»

(lACS interpretation LL.8)

Regulation 18(2)

Only those doorways in deckhouses leading to or giving access to ways leading below, need to be fitted with doors in accordance with Regulation 12.Alternatively, if stairways within a deckhouse are enclosed within properlyconstructed companionways fitted with doors complying with Regulation 12, thenthe external doors need not be weathertight

companion-Where an opening exists in a superstructure deck or in the top of a deckhouse

on the freeboard deck which gives access to space below tbe freeboard deck or to aspace within an enclosed superstructure and is protected by a deckhouse, then it isconsidered that only those side scuttles fitted in spaces which give direct access to

an open stairway need be fitted with deadlights in accordance with Regulation 23

A cabin is considered to provide adequate protection against the minimal amount

of water which will enter through a broken side scuttle glass fitted on the secondtier

Regulation 18(3):

In the application of Regulation 18 it is understood thgt:

(1) where access is provided from the deck above as an alternative to accessfrom the freeboard deck in accordance with Regulation 3(10)(b) thenthe height of sills into a bridge or poop should be 380 millimetres Thesarne consideration should apply to deckhouses on the freeboard deck;