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22 eka Rabin i. MAMO—Tug—Twin Screw—Diesel Direct Drive Name—MaAmo Owner—yYoung Brothers Ltd. Builder—Bethlehem S. B. Corp., Union Plant Naval Architect—L. H. Coolidge Launched—Feb. 14, ’81; comp. Mar. 26, ’31 Classification—Owner’s requirements HULL PARTICULARS Length over all, 129 feet 2 inches; length be- tween perpendiculars, 120 feet; breadth molded, 28 feet; depth molded, 15 feet 2 inches; draft molded, 12 feet; displacement loaded, 575 tons; gross tonnage, 332; net tonnage, 28; bunker fuel capacity in tons, 150; deadweight at 12-foot draft, 162 tons; speed, 11% knots. MACHINERY PARTICULARS Main Engines—Two, Fairbanks-Morse, 5 cyl- inder, 16 inches by 20 inches, 750 brake horse- power each, 2-cycle diesel engines of the pump scavenging, solid injection type, direct connected to 88 inches diameter by 55% inches pitch, four- bladed bronze propellers, developing the rated horsepower at 260 revolutions per minute. Auxiliary Generators—Two Fairbanks-Morse, 3-cylinder, 6 inches by 6% inches, 800 r.p.m., 45 brake horsepower diesel engines with direct con- nected 30 kilowatts, 125-volt direct current gen- erators on one end, and 50 cubic foot, 2-stage, air compressors, clutch connected to opposite end, all mounted on cast iron sub-base. AUXILIARY EQUIPMENT Pumps—Fairbanks-Morse & Co. a — DESCRIPTION The MAmo is a twin screw ocean-going die- sel tug, for Hawaiian inter-island service, con- structed of steel on the transverse system of framing, with a grace- ful sheer, straight stem and elliptical stern. The propelling machinery is located amidships, with deep fuel oil tank im- mediately forward and aft. Speed on _ trial was 11.41 knots. Capstan-Windlass—Allan Cunningham Steering Engine—Allan Cunningham. Propellers—Coolidge Propeller Co. Towing Machine—Allan Cunningham Refrigeration—Frigidaire Sales Corp. Electric Motors—Fairbanks Morse & Co. Oil Purifier-—The DeLaval Separator Co. Storage Batteries—Edison Storage Bat. Co. Whistle—Allan Cunningham Thrust Bearings—Kingsbury Mach. Works This vessel is said to be the largest diesel tug under American registry and is in every respect fitted for the longest voyages on the high seas, though she is intended for service among the islands of the Hawaiian group. There are two deck houses for the accommo- dations of officers. The upper house on the navi- gating deck is built of wood and accommodates the wheelhouse, captain’s and owner’s rooms. An inside stairway leads down to the large steel house located on the main deck, which con- tains the chief engineer’s room, mates room, gal- ley, officers’ and crew’s mess room, bathrooms, engine hatch and towing machine room. The remainder of the crew are berthed on the lower deck forward. The vessel is equipped with an Allan Cunning- ham towing machine driven by a 50-horsepower electric watertight motor with an electro-mag- netic brake and an automatic wire tension con- trol. The towing engine has one drum suitable to handle 1600 feet of 134-inch diameter cable. J — oat i Pil Geet ile | h } t i RES a | + | } MARINE REvirw—April, 1932