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34 DAHLIA—Lighthouse Tender—Lakes—Single Screw—Diesel Name—DAHLIA Owner—United States Lighthouse Service Builder—Great Lakes Engineering Works Naval Architect—U. S. Lighthouse Service Launched—Aug. 26, ’33; Comp. Nov. 10, ’33 Classification—Lighthouse Service HULL PARTICULARS Length overall, 81 feet, 2 inches; length be- tween perpendiculars, 72 feet; breadth molded, 20 feet; depth molded, 9 feet, 6 inches; draft, forward, 6 feet; aft, 7 feet; displacement loaded, 160 tons; gross tonnage, 111; net tonnage, 52; cargo capacity, 5 tons; bunker diesel fuel oil capacity, 5 tons; speed in service, 8 knots. MACHINERY PARTICULARS Main Engine—One, four cycle, six cylinder, 10 x 14 inches, diesel engine built by Winton Engine Corp. Engine develops 235 horsepower at 350 revolutions per minute. Boiler—For heating only. One marine water- tube boiler built by the Almy Watertube Boiler Co.; size 77 square feet; oil burning equipment, Ray Engineering Inc. Auxiliary Generator—One, 15 h.p., 2 cyl., Winton diesel driven generator, 10 k.w. hs a DESCRIPTION Substantially constructed of steel, the DAHLIA was designed pri- marily for lighthouse work in the Detroit and St. Clair rivers which accounts for the limited dimen- sions. She is fully equipped, however, to carry out all of the functions of the usual lighthouse tender. For lifting buoys and other equipment there is installed a 5-ton capacity derrick, with 27- foot steel boom served by an elec- tric winch. AUXILIARY EQUIPMENT Pumps—Nash; Westco; Goulds; Rumsey Windlass—Lidgerwood Mfg. Co. Winch—Lidgerwood Mfg. Co. Steerling Gear (Hand)—Lidgerwood Mfg. Co. Plumbing, Valves, Fittings—Crane Co. Refrigeration—General Electric Co. Marine Hardware—The Dayton Mfg. Co. Stern Bearings—Rubber, B. F. Goodrich Co. Electric Motors—Diehl Mfg. Co. Silencers—Engineering Specialties Co. Fire Extinguishers—Walter Kidde & Co. Thrust Bearings—Kingsbury Machine Works Telegraphs—Chas. J. Henschel & Co. Ine. Revolution Counters—Alexander McNab REMARKS A three-drum electrically driven hoister is located in the after end of the cargo hold with leads passing up through sheaves on the derrick mast under the deck to a five-ton boom, which is stepped on the derrick mast about 6 feet above the deck. The boom has capacity for a five-ton lift. A steel house on the main deck encloses the living quarters aft for the engineer and captain. Crew quarters are located below, Q Pd} MARINE REVIEw—April, 1934