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Tug-Barge Systems And Shipboard Waste Disposal Discussed By No. Calif. Sect. Over 100 members and guests attended a technical program consisting of a symposium at which papers were presented on the subject of tug-barge systems by Edmund L. Hukill, vice president, Ingram Ocean Systems, Inc., New Orleans, La.; William P. Wood, presi- dent, Envirosol, Inc., Fairfield, Calif.; Miklos M. Kossa, naval architect, and Norman Far- mer, George G. Sharp, Inc., New York, N.Y., at the January 11 dinner meeting of the North- ern California Section of The Society of Naval Architects and Marine Engineers'at the Engi- neers Club, San Francisco, Calif. Mr. Hukill discussed the two Ingram tug- barge combinations currently operating be- tween Puerto Rico and Boston, Mass., includ- ing a report on their findings to date on the barge failure during loading in January 1972. Mr. Wood briefly detailed the contemplated roll-on/roll-off garbage disposal barge systems currently contemplated for the metropolitan San Francisco area. He additionally reviewed his previous experience with Foss Towing. Mr. Farmer outlined the scope of a current Maritime Administration study into all phases of tug-barge operations which will involve both detailed design and economic analysis of powers up to 50,000 hp and 100,000 dwt. An additional feature of the study is to de- velop a "Systems Analysis Technique" for use by interested U.S. firms. Mr. Kossa summarized the major types of tug systems, outlining both advantages and Pictured at the January meeting are, left to right: Norman Farmer, George G. Sharp, Inc., author; Jack Troyer, Todd Shipyards, Section chairman; Miklos M. Kossa, naval architect, author; William P. Wood, president, Envirosol, Inc., author, and Edmund L. Hukill, vice president, In- gram Ocean Systems, Inc., author. disadvantages from a naval architect's point of view. Clyde Jacobs, Crown Zellerbach; Command- er Malberg, USCG; Vincent Van Riper, American Bureau of Shipping; David Sey- mour, naval architect; Robert Herbert, naval architect; Jack Gary, Ohio Barge; and Ted Weiss, Marcona Corporation, additionally con- tributed to an extensive discussion period which brought out the following observations: (a) Minimum tug crews in ocean service are 12 to 14, compared with a ship's comple- ment of 34. (b) Tugs in moderate horsepowers are avail- able cheaper in the United States -than else- where in the world. (c) A 2^-percent rate is available on Hull and Machinery insurance for at least one tug- barge system on a "worldwide trading" basis. (d) The Ingram tug-barge has functioned successfully up to 5 knots in 50-foot seas. (e) The ideal tug application should have the sea passage time equal to the loading or discharge time. (f) The limit on "towing" is suggested as approximately 12 knots based on a 2j^-inch maximum practical wire size. (g) Up to a 2-knot speed gain has been ob- served on a "ship hull" barge with a control- lable steering device. (h) A summary statement was suggested to the effect that a tug-barge system is an "Insult to the Naval Architecture profession stemming from archaic Government laws and regulations compounded by inept Labor and Management Negotiators." WASTE DISPOSAL DISCUSSION: Approximately 75 mem- bers and guests attended the presentation of the technical paper "A Zero Discharge Method for Shipboard Waste Disposal" by Edward P. Foster of the Babcock & Wilcox Co. at the December 14 meeting of the Northern Califor- nia Section of The Society of Naval Architects and Marine Engineers, also held at the Engineers Club in San Fran- cisco. The paper reviewed various types of sewage treat- ment and described in detail why total incineration in the ship's boilers is recommended by the author on both an environmental and economic basis. Shown at the meeting are, left to right: J. Troyer, Todd Shipyards, Section chair- man; Mr. Foster, author; M. Kossa, naval architect, papers committee chairman, and Robert Whitam, marine sales manager, Babcock & Wilcox Co. REPAIR AT DUNKIRK BELIARD, CRIGHTON 28 Maritime Reporter/Engineering News
