Page:United States Statutes at Large Volume 47 Part 2.djvu/684

 2288 INTERNATIONAL LOAD LINE CONVENTION. JULY 5, 1930. Air pipes. Openings in ship's ~ides. Where such ventilators are situated on the freeboard deck, or on the superstructure deck within a quarter of the ship's length from the stem, and the closing arrangements are of a temporary character, the coamings are to be at least 36 inches in height; in other exposed positions on the superstructure deck they are to be at least 30 inches in height. Where the coaming of any ventilator exceeds 36 inches in height, it is to be specially supported and secured. Rule XXV.- Air Pipe8. Where the air pipes to ballast and other tanks extend above free- board or superstructure decks, the exposed parts of the pipes are to be of substantial constructio.Ll.; the height from the deck to the open- ing is to be at least 36 inches in wells on freeboard decks, 30 inches on raised quarter decks, and 18 inches on other superstructure decks. Satisfactory means are to be provided for closing the openings of the air pipes. Opening8 in the Sides oj Ships. Rule XXVI. -Gangway, Oa1'go and Ooaling Port8, &:c. To be fitted with watl'r ·tlght covers. Openings in the sides of ships below the freeboard deck are to be fitted with watertight doors or covers which, with their securing appliances, are to be of sufficient strength. Rule XXVII.- Scupper8 and Sanitary Discharge Pipe8. ta":ltrgaen:I- Discharges led through the ship's sides from spaces below the freeboard deck are to be fitted with efficient and accessible means for preventing water from passing inboard. Each separate discharge may have an automatic non-return valve with a positive means of closing it from a position above the freeboard deck, or two automatic non-return valves without positive means of closing, provided the upper valve is situated so that it is always accessible for examination under service conditions. The positive action valve is to be readily accessible and is to be provided with means for showing whether ClIIlt iron not to be the valve is open or closed. Cast iron is not to be accepted for such \l!1Cd. • valves where attached to the sIdes of the ship.