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at 225 pounds per square inch pres- sure and 50 degrees Fahr. superheat, exhausting to a vacuum of 26 inches in the auxiliary condenser. The bore and stroke of the engines will be approximately 12 x 20 x $3 x 34 inches. Both engines will be full reversing and will be designed and built entirely in accordance with the rules of the American Bureau of Shipping. The boilers will be of the cross drum, watertube, marine type, with straight tubes and independent steel casing for each boiler. These boilers will be designed for a safe working pressure of 250 pounds per square inch. The furnaces will be arranged for the burning of oil as fuel. The main dredging turbine will have a normal operating speed of 26 revolutions per minute on steam at 225 pounds per square inch pres- sure, and 150 degrees Fahr. super- heat. This main turbine will be con- nected to a reduction gear by flex- ible coupling which in turn connects with the main dredging pump. The main dredging pump will be of the single suction type having a suction opening 34 inches in diameter. The reduction gear will be capable of transmitting loads up to 1400 brake horsepower. Complete Heavy Repairs on Bottom of Steamer The steamer Harry Bowen of the Pocahontas Steamship Co.’s fleet recently returned to service after undergoing extensive bottom repairs at the Morse plant of United Dry Docks Ine. The job was completed in 45 days or 15 days ahead of contract time. It involved the renewal of all bot- tom plating, practically all frames and floors and installation of a new propeller. The Harry BOWEN was Steamer Harry Bowen Docked. at Morse Plant of United Dry Docks Inc. S08 SNERSEERRETEOTSRERE HITSAP co. > TRANSPORTATION ¢ co. a at | 5 ae Passenger and auto ferry Vashon built by Lake Washington Shipyards for Kitsap County Transportation Co. damaged when she went aground off Montauk, Long Island, and pounded on the beach for several days before she could be pulled off. An idea of the work involved is gained from the fact that 90 shell plates were renewed and 21 others faired; 55 full floor plates were re- newed and 63 others were faired; 44 skeleton floors were renewed and 63 were faired; 127 shell frames were renewed down to the floors and 104 were faired; 151 intercostal plates were renewed and 352 others were faired. To Install Ballast Tanks The Midland Steamship Co., Cleve- land has awarded to the American Ship Building Co. at its Lorain yard the contract for installation of new ballast tanks in the steamer Mt- CHAEL GALLAGHER. It is understood that the work will provide employ- ment for approximately 100 men for about 2% months. This vessel is 420 feet long, 54 feet beam and 28 feet depth. Work of installing the new tanks is to begin following com- pletion of the scow which is being built at the yard for the Great Lakes Dredge & Dock Co., which is prac- tically completed. Large Double Ended Ferry In Service on Pacific Coast The wooden passenger and automo- bile ferry VASHON shown in the ac- companying illustration, was built for the Kitsap county Transportation Co. Seattle, Wash. by the Lake Washing- ton Shipyards, Houghton, Wash. This vessel which was designed by Walter Lynch, naval architect of Seattle, Wash., was launched May 10, 1930 and completed May 30, 1930. She is built to the classification of the American Bureau of Shipping. The particulars of the hull are as follows: Length over all, 200 feet; length between perpendiculars 171 feet 5 inches; breadth molded, 57 feet 6 inches; depth molded 16 feet 3 inches; draft light 12 feet; displace- ment light 751; gross tonnage 641; net tonnage 436; passenger capacity 1000 first-class; cargo capacity 90 au- tomobiles; bunker fuel capacity 42 tons; average cruising speed, 12 MARINE REview—April, 1931 knots; maximum speed 12% knots. The propelling machinery consists of one 8-cylinder, 18 inches bore by 24 inches stroke, 925 brake horse- power at 200 revolutions per minute, non-reversing four-cycle, solid injec- tion, trunk piston type, diesel engine, built by the Washington Iron Works, Seattle, Wash. The VAsHoN is the largest double ended ferry boat operating on the waters of Puget sound. She was de- signed from plans by Capt. John L. Anderson, president of the Kitsap County Transportation Co., under supervision of Walter Lynch, naval architect. Capt. Anderson has been en- gaged in local ferry service in waters adjacent to Seattle for many years. Through his experience he was able to work out a design which has proved very satisfactory for the needs of the route. The VASHON is operated be- tween Seattle and Vashon island ports. Travel to island and suburban cen- ters on Lake Washington and Puget sound has increased greatly during the past few years. Great Lakes Dredge & Dock Uw. has built a new turbine tug which wap launched March 21, at the yards of the Manitowoc Ship Building Co., Manitowoc, Wis. The vessel was named Harry B. WiritAmMs, for the treasurer of the company. The tug’s maiden voyage will be to Sault Ste. Marie, Mich., where the Great Lakes Dredge & Dock Co. is starting work on a large government contract. Lay Keels for New Tugs The keels of the four tugs to be built for the government have been laid at the yard of the Marine Iron and Shipbuilding Co., Duluth. Work is to go ahead rapidly on the vessels in order that they may be completed by July 1. This work involves ap- proximately $200,000. The vessels are to be 65 feet 6 inches in length and 17 feet beam. They will carry a complete electrical system and will be powered with 325- horsepower diesel engines. One of the tugs will be assigned to the United States engineer office at Du- luth, two to the war department at Milwaukee, and the fourth to the government office at Buffalo. 81