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3. In passenger ships the competent authority may on condition that satisfactory arrangements are made for lighting and ventilation permit the location of sleeping rooms below the load line, but in no case immediately beneath working alley ways. 4. The floor area per person of sleeping rooms intended for ratings shall be not less than — (a) 20 sq. ft. or 1-85 sq. m. in vessels under 800 tons ; (b) 25 sq. ft. or 2-35 sq. m. in vessels of 800 tons or over, but under 3,000 tons ; (e) 30 sq. ft. or 2-78 sq. m. in vessels of 3,000 tons or over : Provided that, in the case of passenger ships in which more than four ratings are berthed in one room, the minimum per person may be 24 sq. ft. (2-22 sq. m.). 5. In the case of ships, in which are employed such groups of ratings as necessitate the employment of a substantially larger number of ratings than would otherwise be employed, the competent authority may, in respect of such groups, reduce the minimum floor area of sleeping rooms per person, subject to the conditions that — (a) The total sleeping space allotted to the group or groups is not less than would have been allotted had the numbers not been so increased, and (b) The minimum floor area of sleeping rooms is not less than — (i) 18 sq. ft. per person in ships under 3,000 tons : (ii) 20 sq. ft. per person in ships of 3,000 tons or over. 6. Space occupied by berths and lockers, chests of drawers and seats shall be included in the measurement of the floor area. Small or irregularly shaped spaces which do not add effectively to the space available for free movement and cannot be used for installing furniture shall be excluded. 7. The clear head room in crew sleeping rooms shall not be less than 6 feet 3 inches (190 cm.). 8. There shall be a sufficient number of sleeping rooms to provide a separate room or rooms for each department: Provided that the competent authority may relax this requirement in the case of small ships. 9. The number of persons allowed to occupy sleeping rooms shall not exceed the following maxima : " • _ (a) Officers in charge of a department, navigating and engineer officers in charge of a watch and senior radio officers or operators : one person per room ; (b) Other officers : one person per room wherever possible, and in no case more than two ; (c) Petty officers : one or two persons per room, and in no case more than two ; (d) Other ratings : two or three persons per room wherever possible, and in no case more than four. 10. In passenger ships, permission may be given to accommodate not more than ten ratings belonging to the catering department per sleeping room. 11. The maximum number of persons to be accommodated in any sleeping room shall be indelibly and legibly marked in some place in the room where it can conveniently be seen. 12. Members of the crew shall be provided with individual berths. 13. Berths shall not be placed side by side in such a way that access to one berth can be obtained only over another. 14. Berths shall not be arranged in tiers of more than two ; in the case of bertha placed along the ship's side there shall be only a single tier. 15. The lower berth in a double tier shall be not less than 12 inches (30 cm.) above the floor ; the upper berth shall be placed approximately midway between the bottom of the lower berth and the lower side of the deckhead beams. 16. The minimum inside dimensions of a berth shall be 6 feet 3 inches by 2 feet 3 inches (190 cm. by 68 cm.). 17. The framework and the lee-board, if any, of a berth shall be of approved material, hard, smooth, and not likely to corrode or to harbour vermin. 18. If tubular frames are used for the construction of berths, they shall be completely sealed and without perforations which would give access to vermin.

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