LL62

LL62
Side Scuttles, Windows and Skylights
LL62(1997)(cont)(Rev.1 July2008)
(Corr.1Aug 2010)(Corr.2
June 2024)

Interpretation of Regulation 23 of Annex I of Chapter II of the International Convention
on Load Lines, 1966
Regulation 23 reads as follows:(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 tothe freeboard deck at side and having its lowest point 2.5 per cent of the breadth (B) above
the load waterline, or 500 millimetres (19 ½ inches), whichever is the greater distance.
(3) The side scuttles, together with their glasses, if fitted, and deadlights, shall be of
substantial and approved construction.

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Note:
1. This UI is also applicable to Regulation 23 of the 1988 Protocol.
2. Paragraph 7 of this Unified Interpretation is applicable to Regulation 23(7)(c) of therevised 1988 Protocol.
3. Paragraph 11 of this Unified Interpretation is applicable to Regulation 23(11) of therevised 1988 Protocol.

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(cont)

Interpretation(1)
Side scuttles and windows together with their glasses, deadlights1 and storm covers, iffitted, shall be of approved design and substantial construction in accordance with, or
equivalent to, recognised national or international standards. Non-metallic frames are notacceptable.
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1 ‘Deadlights’, in accordance with recognised standards, are fitted to the inside of windows and side scuttles while‘storm covers’, of comparable specifications to deadlights, are fitted to the outside of windows, where accessible,
and may be hinged or portable.

(2)
Side scuttles are defined as being round, or oval, openings with an area notexceeding 0.16 square metres. Round or oval openings having areas exceeding 0.16 square
metres shall be treated as windows.
(3)
Windows are defined as being rectangular openings generally, having a radius ateach corner relative to the window size in accordance with recognised national orinternational standards, and round, or oval, openings with an area exceeding 0.16 square
metres.
(4)Side scuttles to the following spaces shall be fitted with efficient hinged inside
deadlights:(a) spaces below freeboard deck(b) spaces within the first tier of enclosed superstructures(c) first tier deckhouses on the freeboard deck protecting openings leading below or
considered buoyant in stability calculations.
The deadlights shall be capable of being effectively closed and secured watertight if fitted
below freeboard deck and weathertight if fitted above.
(5)
Side scuttles shall not be fitted in such a position that their sills are below a line drawn
parallel to the freeboard deck at side and having its lowest point 2.5 percent of the breadth B,
or 500 mm, whichever is the greatest distance, above the summer load line (or timbersummer load line if assigned).
(6)
Side scuttles shall be of the non-opening type in ships subject to damage stability
regulations, if calculations indicate that they would become immersed by any intermediatestage of flooding or the final equilibrium waterplane in any required damage case.
(7)
Windows shall not be fitted below the freeboard deck, in the first tier end bulkheads orsides of enclosed superstructures and in first tier deckhouses considered buoyant in thestability calculations or protecting openings leading below.
(8)Side scuttles and windows at the side shell in the second tier, protecting direct accessbelow or considered buoyant in the stability calculations, shall be provided with efficient
hinged inside deadlights capable of being effectively closed and secured weathertight.
(9)Side scuttles and windows set inboard from the side shell in the second tier,protecting direct access below to spaces listed in paragraph (4), shall be provided with either
efficient hinged inside deadlights or, where they are accessible, permanently attachedexternal storm covers of approved design and of substantial construction and capable ofbeing effectively closed and secured weathertight.

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(cont)(10) Cabin bulkheads and doors in the second tier separating side scuttles and windows
from a direct access leading below may be accepted in place of deadlights or storm covers
fitted to the side scuttles and windows.
(11) Deckhouses situated on a raised quarter deck or on the deck of a superstructure ofless than standard height or on the deck of a deckhouse of less than standard height, may be
regarded as being in the second tier as far as the provision of deadlights is concerned,
provided the height of the raised quarter deck, superstructure or deckhouse is equal to, or
greater than, the standard quarter deck height.
(12) Fixed or opening skylights shall have glass thickness appropriate to their size andposition as required for side scuttles and windows. Skylight glasses in any position shall beprotected from mechanical damage and where fitted in positions 1 or 2, shall be provided withrobust deadlights or storm covers permanently attached.

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