Article 8 Ventilators

In every vessel of 12 metres in length and over to which these Rules apply coamings of ventilators shall be of substantial construction and capable of being closed weathertight by devices permanently attached to the ventilator or adjacent structure provided that, subject to the requirements of Rule 59(1), weathertight closing appliances need not be fitted to ventilators in which the coamings extend more than 4.5 metres above the freeboard deck or more than 2.3 metres above the superstructure deck and provided further that the requirements of this Rule shall not apply to vessels under 24.4 metres in length where the ventilators are fitted in the top of the casing or deckhouse and where such ventilators are positioned not more than one-fifth of the moulded breadth of the vessel from the centreline of the vessel and the lowest point at which water might gain access through the ventilator is not less than 1.5 metres above the freeboard deck.