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August, 1917 THE MARINE REVIEW Launch Four Vessels in One Day Four vessels were launched on June 16 at one Canadian shipbuild- ing plant. Two other sister ships were launched two weeks later. The six keels had been laid down just 12 weeks prior to the first launching. The boats, which will operate in connection with Canada’s fisheries, carry names which are indelibly engraved in the dominion’s military history — Ypres, Vimy, Messi- NES, ST. JULIEN, St. Exor and’ Festvu- BERT. The boats were built by the Polson Iron Works, Ltd., Toronto Ont. They are 140 feet in overall length, 23 feet 6 inches wide and 13 feet 6 inches in molded depth. They carry fore and aft compound surface condensing engines, with cylinders 18 and 38 inches in diam- eter by 24-inch stroke, developing 500 horsepower. The boiler equipment is of the Howden water tube type, with down draft, and working with steam at 180 pounds pressure. These ships are the first Canadian-built vessels to be equipped with this type of boiler. The» boats are fitted with electric lights, are steam-heated and have evaporating out- fits fitted complete for salt water serv- ice. The machinery, boilers, auxiliaries, spars, booms and joiner work weré all ready for installation. The company by delivering the boats in July anticipated the contract delivery date by about two months. The Polson company also is building ten 3500-ton deadweight steamers, all of the same type, for ocean service. The last of these boats will be delivered before the close of the lake season of 1918. These ships are 261 feet long, 43 feet 6 inches wide and 22 feet 11% inches deep. They carry triple expan- sion surface condensing engines, with cylinders 20%4, 33 and 54 inches by 36- inch stroke, developing 1250 horsepower. Each steamer carries two Scotch marine boilers, 14 feet in diameter and 12 feet long. These freighters carry electric plants, searchlights, cargo winches, steam windlasses, steam and _ hand-steering gears and 15-ton evaporating outfits. The volume of work at the Polson yard has necessitated additions to the buildings and equipment. A boiler shop, 250 x 90 feet, is being built. It is of steel and concrete construction and will be modernly equipped. When this build- ing is completed, the present boiler shop will be refitted as an extension to the machine shop and engineering depart- ment. A new 10-ton gantry crane is being erected on the east side of the dock, which makes it possible to lay down four 3500-ton deadweight vessels at the same time. Two additional storehouses have been built, one for storing lumber and the second for auxiliaries and parts purchased outside. FOUR BOATS READY TO LAUNCH IN ONE DAY. THE OTHER TWO WERE LAUNCHED TWO WEEKS LATER. THE KEELS WERE LAID ONLY TWELVE WEEKS PREVIOUS