290 SOCIETY NAVAL ARCHITECTS AND MARINE ENGINEERS. 



"Paragraph 4. Floating line. 



"Should the floating line be fixed at some definite distance, or distance-ratio, below the 

 bulkhead deck, for all ships, and, if so, what should this distance or distance-ratio be? If 

 not, on what basis should the distance of the floating line from the bulkhead deck be deter- 

 mined in the various cases to be dealt with ? 



"Paragraph 5. Permissible extent of flooding. (See items (a), (b), and (c), Sec. 4 

 above. ) 



"7. General requirements for spacing and height of transverse bulkheads, and location 

 and extent of longitudinal bulkheads and water-tight decks. 



"8. If the permeability assumed for spaces forward and abaft the machinery spaces is 

 such as to take correct account of the amount of cargo space and passenger space, respectively, 

 in any vesse, is it necessary that the other two elements in subdivision (viz., distance of float- 

 ing line from bulkhead deck, and number of compartments into which the floodable length is 

 divided) should vary for vessels of the same length, but of different type or engaged in dif- 

 ferent service ? 



"9. Should rules as to subdivision be prescribed for vessels below the smallest length or 

 least size covered by the questions and conditions set forth in preceding paragraphs? 



SECOND SUBCOMMITTEE. 



"1. Bulkheads.' 



"Character and construction of water-tight bulkheads (transverse, longitudinal, wing, 

 stepped). 



"Physical tests to be applied to same while under construction. 



"Prohibition of changes in, except when authorized. 



"2. Double bottoms. Character and extent of double bottoms. Wells. 



"3. Openings in water-tight bulkheads below bulkhead deck. Water-tight bulkheads be- 

 low bulkhead deck; water-tightness not to be impaired by openings, except when absolutely 

 necessary. (1) Doors. (2) Scuttles and bolted plates. (3) Sluices. (4) Trunks (for 

 passage of crew, forced draft, refrigeration, etc.). (5) Openings for drainage pipes, electric 

 wires, etc. 



"4. Water-tight doors. (1) Type, hinged or sliding. (2) Location (are they abso- 

 lutely necessary in any main transverse water-tight bulkhead below bulkhead deck; if so, 

 where, and with what restrictions?) (3) Material used in their construction. (4) Opera- 

 tion (hand, mechanical, automatic). (5) Stations from which operated. (6) Necessary 

 general features of design. (7) Indicating and alarm system and emergency control. (8) 

 Character and frequency of inspection and tests of water-tight door system, and all mecha- 

 nism and indicators connected therewith. (9) General water-tight door closing drills. (10) 

 Record of all tests and drills to be entered in log, and note made where doors or mechanism 

 are out of order. (11) Are they to be kept closed except when opening necessary for work- 

 ing of vessel. (12) Shall water-tight doors be closed at night, in foggy weather, and when 

 in vicinity of icebergs ? 



"5. Water-tight decks. (1) Location, character, strength, and tests. (2) Location and 

 method of closing openings in same. (3) Scuppers. (4) Preservation of water-tight in- 

 tegrity by prohibiting unauthorized changes in same, and note made in ship's log of all 

 changes affecting water-tight integrity. 



"6. Openings in side. ( 1 ) Side scuttles, chutes, scuppers, etc. ; when permissible, and lo- 

 cation with respect to water line. (2) Air ports; when permissible, and location with respect 

 to water line. 



"7. Machinery spaces. (1) Division of bulkheads. (2) Grouping of boiler rooms with 

 respect to water-tight compartments. (3) Maximum length of water-tight compartments in 

 machinery space. (4) Practicability and desirability of wing bulkheads in vessels of broad 

 beam. 



