Annex Unified Interpretations Relating to the International Convention on Load Lines, 1966
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Statutory Documents - IMO Publications and Documents - Circulars - Maritime Safety Committee - MSC.1/Circular.1534 Unified Interpretations Relating to the International Convention on Load Lines, 1966 (6 June 2016) - Annex Unified Interpretations Relating to the International Convention on Load Lines, 1966

Annex Unified Interpretations Relating to the International Convention on Load Lines, 1966

 Regulation 13 Position of hatchways, doorways and ventilators

1 For the purpose of these regulations, two positions of hatchways, doorways and ventilators are defined as follows:

  • Position 1 Upon freeboard decks and raised quarterdecks, or other exposed decksfootnote lower than one standard height of superstructure above the freeboard deck, and upon exposed decksfootnote situated forward of a point located a quarter of the ship's length from the forward perpendicular that are located lower than two standard heights of superstructure above the freeboard deck.

  • Position 2 Upon exposed decksfootnote situated abaft a quarter of the ship's length from the forward perpendicular and located at least one standard height of superstructure above the freeboard deck and lower than two standard heights of superstructure above the freeboard deck.

Upon exposed decksfootnote situated forward of a point located a quarter of the ship's length from the forward perpendicular and located at least two standard heights of superstructure above the freeboard deck and lower than three standard heights of superstructure above the freeboard deck.

Regulation 20 Air pipes

2 Where air pipes to ballast and other tanks extend above:

  • .1 the freeboard deck; or

  • .2 other exposed decksfootnote lower than two standard heights of superstructure above the freeboard deck,

the exposed parts of the pipes should be of substantial construction, and the height from the deck to the point where water may have access below should be at least:

  • .1 760 mm on the freeboard deck or other exposed decksfootnote lower than one standard height of superstructure above the freeboard deck; and

  • .2 450 mm on other exposed decksfootnote lower than two standard heights of superstructure above freeboard deck.

Note: Flush bolted access covers, which are of substantial construction and are secured by gaskets and closely spaced bolts to maintain water tightness, are not subject to the minimum sill height requirements.


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