The following text may have been generated by Optical Character Recognition, with varying degrees of accuracy. Reader beware!

236 THE MARINE REVIEW July, 1912 A REMARKABLE SNAPSHOT OF A WaARSHIP's RAM Out oF WATER The British Cruiser Pegasus of the Australian Station in a Rough Sea in Australian Waters Detter than 11 knots. "It? is. stated that these trials were very satisfac- tory, although under the confidential contracts by which this work is be- ing done, the government specifica- tions and requirements are not made public. As heretofore stated these submarines are propelled by 6-cyl- inder, 4-cycle, heavy oil burning, in- ternal combustion engines of the Diesel type. That the staunchest construction is required is evident by the hazardous nature of the employment of these craft. For instance, the water bal- last tanks are tested to 75 lb. to the square inch, while the fuel tanks are subjected to the same test in addi- tion to 15 Ib. of air. The motors are all built to the stringent tests of the Electric Boat Co., in addition to 100 per cent overload. Every rivet and every piece of material is thor- oughly inspected and no work done for the government is so closely watched as is that in these submarine vessels. The Electric Boat Co., under its government contracts; is building two more submarines at the Seattle Con- struction and Dry Dock Co.'s plant. No. 30 is about 65 per cent completed and No. 35 is about 25 per cent com- pleted. F4, which was launched with F3, will be ready for preliminary trials Aug. 22, and it is expected to have her ready for the official trials about Sept 7. In addition to building four submarines at San Francisco, the Electric Boat 'Co. is building at the Seattle plant two submarines for the Chilean government.. These are al- ready about 15 per cent completed. British Committee on Bulkheads The president of the British board of trade has appointed a_ technical committee to advise him in the inter- ests of safety of life at sea with regard to the internal sub-division of vessels of all classes by water- tight bulkheads and other means. The reference to the committee is to ad- vise: (1) As to what, in their opinion, would constitute efficient sub-division with regard to each of the classes of vessels included in the rules for life- saving appliances made by the board of trade under Section 427 of the Merchant Shipping Act (1894), hav- ing due regard to the nature of the service in which they are respectively engaged. (2) Whether, independently of the foregoing, the committee desire to make any recommendation with ref- erence to the sub-division of vessels already built or new vessels, which would, in their opinion, contribute to the safety of life at sea. The committee is constituted as follows: Archibald Denny, of William Den- ny & Bros., Dumbarton, naval archi- tect (chairman). James Bain, late superintendent en- gineer of the Cunard Line, engineer. H. R. Champness, assistant director of naval construction, admiralty. G. B. Hunter, of Swan, Hunter & Wigham Richardson, Ltd., Wallsend- on-Tyne, naval architect. Summers Hunter, of the Northeast- ern Marine Engineering Co., Ltd.; Wallsend-on-Tyne, engineer. J. Foster King, chief surveyor of the British Corporation for the Sur- vey and Registry of Shipping. Andrew Laing, of the, Wallsend Slipway & Engineering Co., Walls- end-on-Tyne, engineer. Wevtto Luke,. of John Brown & Co. Ltd Clydebank, naval architect. ST e. Thearle, D.Sc., chief ship surveyor of Lloyds Register of Brit- ish and Foreign Shipping. Te) ye Welch, professor of naval architecture, Armstrong College, New- castle-on-Tyne. It is recognized among naval arch- itects and ship builders that the in- quiry should delve deeply into: (1) ie. design and construction of watertight bulkheads, with special reference to those having very large unsupported areas, not backed up by