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Under the new specifications the general dimensions of the vessel are: length over guards 128 feet; length on 9% foot water line, 118 feet; breadth over guards, 44 feet; breadth of hull on 9% foot water line, 34 feet; depth of hull at side, molded, 14 feet 6 inches; depth of hull at cen- ter, amidships 15 feet 2 inches; draft in light service condition above base, 8 feet 6 inches. The hull of this vessel is laid out with as straight line cross. section as possible in order to simplify con- struction and reduce cost. The exten- sion of the deck over the hull is car- ried by flaring out the sheer strake to reach the guards. Avoidance of. hull brackets was considered necessary on account of the floating driftwood and timbers which would tend to bend and loosen them. The flare is attained by flanging the interior bracket plates to take the flared hull sheer strake plates. A keel of the flat plate type 44 inches wide of 23-pound plate is re- quired for 3/5 of its length increas- ing to 25.5-pound plate at the ends. The center keelson will consist of a <TIne | Wit acl nal SSN a a ooo i Sa ee ee eh ee a eee - hoe ete a eh RT LSI NENG Sr TSP OUTBOARD” PROFILE 20-inch steel I-beam of 65 pounds weight per linear foot, and with flange width of 6% inches. There will be two stem-stern frames, one at each end of the vessel of open-hearth cast steel. The rudders are to be of the balanced and lower pintle type each of extra large size and made of cast steel. The hull plating will vary in weight from 15.38 pounds to 20.4 pounds. The following watertight bulkheads will be fitted; two, one at each peak and two others, each one forming the inboard ends of store room or hold compartments. Diesel or Diesel-Electric Machinery This vessel is to have a single or double acting, two or four cycle, solid or air injection, marine diesel engine of four five, six, or eight cylinders to give about 400 shaft horsepower at normal propeller revolutions. The engine must deliver the required horse- power on standard commercial grade of fuel oil. In the design of the engine the thrust bearings at one end shall be arranged as part of the engine foundation or rigidly attached The engine must be capable thereto. a at ro) 3 alia 4 aa IRBOARD PROFILE of direct mechanical control from the pilot house. An alternative machinery proposal calls for diesel electric drive. In this case two engines, each driving electric generators are called for. The cur- rent so generated may be supplied to one electric motor direct connected to a fore and aft continuous shaft or it may be supplied to two electric motors each connected to its own propeller shaft independent one of the other. Under this proposal each diesel en- gine must deliver 250 brake horse- power. Where the single motor pro- posal is made the motor must be of approximately 375 horsepower at 180 to 200 revolutions per minute and 500 volts. Where the proposal calls for two motors each motor will be rated at 375 horsepower at 180 revo- lutions per minute at 500 volts. Pilot house control " case. The proposals for the construction of this ferry is to be opened at the office of the corps-area quartermaster, second corps-area Governors Island, New York harbor May 2, 1927. The department will supervise the work. OUTBOARD AND INBOARD PROFILES OF THE PROPOSED DIESEL OR DIESEL ELECTRIC FERRY FOR THE ARMY AT NEW YORK HARBOR—BIDS OPENED -MAY 2, 1927 MARINE REVIEW—May, 1927 27 is required in either |