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in remote and/or shallow-draftenvironments.These two tugs are shallow-draftdesigns intended to work Alaska’swestern rivers and coastline. Thissummer’s assignments could see thesturdy tug operating on the Yukonor any of Alaska’s western rivers oralmost anywhere in near-coastalwaters of the Bering or Chukchi Sea.In typical operation she has beenoperating with a 150-foot to 200-footmulti-purpose barge.Dana Cruz, with propulsion geartucked away within her tunneldesignbottom configuration, ispowered by three Caterpillar C-18diesels generating a total of 1,800hp. She also has Cat auxiliary powergenerators. In normal ballast, the tughas draft of only 3 feet 9 inches.Cruz Marine, a unit of CruzConstruction Inc., is part of acompany founded in 1979 by DaveLeading by design.www.ral.caYvan DesgagnesHercules Seaspan Ravenand Dana Cruz. The companyprovides heavy construction services,remote logistics and tundra transportin some of Alaska’s most difficultenvironments. Previously thecompany made heavy use of a 25-foottug combined with a 150-foot barge.Along with construction of thesetwo new tugs, the company is alsoaccepting delivery of a new 200-footDANA CRUZOwner/Operator: Foss Maritime,Authorization:Seattle, Wash.Cruz Marine, AlaskaBuilder: Fred Wahl Marine,Reedsport, Ore.Naval Architect: A.G. McILWain,Vancouer, B.C.Barge Design: Elliott Bay DesignGroup, SeattleDimensions: 92 x 36 x 4Gross Tonnage: 199 or lessTug Displacement 1,867 tonsDesign/type: Triple-screw push tugpaired with 200-footdeck bargeEnginesu Caterpillar C-18diesel enginesu 1,800 total hpu Cat 99-kW auxgeneratorsPropulsionu Twin Disc 3.48:1marine gearsu Osborne 50-inchpropellersu Aquadrive softmounts & thrustbearingsOtherequipmentu Zodiak Pro 12-personutility boatu Palfinger hydraulicdeck craneu Schuyler Rubberfenderingu Markey single-drumwinches fore & aftu Markey anchorwinchu Nabrico face wirewinchesu Hutchison Hayeswater/fuel filtrationsystemsu Furuno radaru Smith Berger towpinsTank capacitiesu Diesel Fuel: 22,000gallonsu Potable water: 2,000gallonsu Lube oil: 300 gallonsType & Area ofOperationu Western Alaksacoastal waters andriversSPECIFICATIONSJim:________________Mike:_______________Ken:________________Rob:________________26 American Tugboat Review 2011
The Foss tugDana Cruzwas builtat the FredWahl Marineconstructioncompany, ofReedsport, Ore.She is 92 feetlong with 1,800hp from triplescrews.gel-cell storage batteries that weighabout 18,000 pounds, accordingto design specifications. Companyengineers report that they have sincefound ways to reduce the number ofrequired batteries and found waysto save space and weight, thus beingable to fit the same equipment intothe relatively confined engine roomspace of Campbell Foss. However,the original hybrid tug conceptrepresented by Carolyn Dorothyinvolved the use of smaller and lightermain engines which are CumminsQSK-50 diesels with Cumminsauxiliary power generators.The newly converted CampbellFoss will retain her Cat main enginesand generators while making roomfor about 80 storage batteries, twoSiemens motor-generators (one foreach carbon fiber shaft) and a largeswitchboard and DC bus housedbetween the two main power plants.•ramp barge for service in the samearea.In other Foss news, the companyis currently in the midst of upgradingand converting one of its Dolphintugs with the same hybrid technologywith which it outfitted its hybridpowertug Carolyn Dorothy in 2008.The 78-foot Campbell Foss wasintroduced in 2006 with 5,080-hpworth of straightforward Caterpillarpower with Rolls-Royce z-drives.As part of her conversion, CampbellFoss will keep her main engines whilebeing equipped with about 80 newstorage batteries, motor generators,and sophisticated control equipment.The power train uses the mainengines to power propeller shaftsdirectly when necessary, but also toturn motor generators that produceelectricity and send it to storagebatteries for additional modes ofpropulsion. The control system ties allthe systems of direct power, electricalgeneration and electrical use together.Conversion of the Campbell Fossis being done with a grant from theCalifornia Air Resources Board andwith assistance from the Port of LosAngeles and the Port of Long Beach.While a number of U.S.and Canadian companies haveannounced plans for hybrid or ‘green’propulsion in new tugboats, so faronly Foss Maritime, working withits engineering partners, has foundthe right formula to actually get onebuilt and working, with another onenow being converted to the samepropulsion scheme.The company’s original hybridtug was outfitted with 126 12-volt,Innovative flexible couplingsfor marine applications.• USA based production• Over 20 unique designs• Over 16 million sold• Torsional Vibration experts• Carbon Fiber Driveshaft LeadersTrust CENTA – The Global InnovatorSince 1970American Tugboat Review 2011 27
Page 1: $5.99 U.S.$5.99 CanadaDisplay until
Page 5 and 6: 2011An annual special issue of Prof
Page 7 and 8: Courtesy Canaport LNGHandling of LN
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