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SNAME Pacific Northwest Section Holds Annual Meeting At Harrison Hot Springs, B.C. Principals shown above during the Pacific Northwest Section meeting, left to right: Doug Hendrix, past chairman of the Section; Dr. R.F. Hooley, professor, structural engineering, University of British Columbia; Robert T. Young, national president of SNAME; the Honorable Jack Davis, Minister of Energy, Transport and Communica- tions, Government of British Columbia; Paul Zankich, vice chairman, Seattle Area, and Gerald Talbot, chairman, Pacific Northwest Section. The annual meeting of the Pa- cific Northwest Section of The Society of Naval Architects and Marine Engineers held at "The Harrison," Harrison Hot Springs, British Columbia, Canada, the weekend of October 7-9, was at- tended by more than 130 mem- bers and guests. The Section was honored to host Robert T. Young, national president of the Society, Mrs. Young, and the guest speaker at the banquet, the Honorable Jack Davis, Provincial Minister of En- ergy Transport and Communica- tions. A buffet/dinner-dance and tal- ent show on Friday evening was enjoyed by all. Door prizes were presented, and the talent show was successfully run by the mas- ter of ceremonies, Elijah Horner, vice chairman of the British Co- lumbia Area Section. On Saturday, the Executive Committee conducted a business meeting over a 7 a.m. breakfast. Saturday morning's technical ses- sion was conducted by the Pacific Northwest Section chairman, who welcomed the Society's national president, Mr. Young. Mr. Young's opening remarks were mainly con- cerned with the difficulty experi- enced across the continent in ob- taining and training ships crew, especially engineering staff. He stated that the majority of recent marine mishaps were caused by the inexperience of the vessel's personnel, and hoped that this would be remedied by a future program with incentives to attract the right people for a particular crew position. Furthermore, he concluded that a study carried out by a prominent environmental research group indicates the vast majority of the oil polluting the oceans was there through natural causes, such as oil seepage, and that oil tankers were responsible for only 3 percent of the total Dr. R.F. Hooley (left) receiving a cer- tificate of appreciation from Robert T. Young. spills, of which about one-half of 1 percent were structurally related. Mr. Talbot introduced Dr. Roy F. Hooley, P. Eng., professor, structural engineering, University of British Columbia, who made an excellent presentation of his tech- nical paper entitled "Ship Vibra- tions." Dr. Hooley discussed and offered solutions to objectionable hull vibrations set up by wave action or, particularly, pulsating machinery and collision impact, both vertical and lateral, which deform the hull to a greater or lesser extent, depending on the type of vessel. He pointed out that in the case of a ship under design, calculations must be ac- curate and conservative to achieve relatively vibration-free results. In the case of an existing vessel that has a vibration problem or a vessel that is about to be al- tered, actual measurements can remove much of the uncertainty and allow a simpler and more ac- curate calculation. Alleviation of vibration problems was discussed, particularly with respect to tank- ers, freighters, ferries, and tri- marans, with emphasis on the fact that a knowledge of the na- tural frequencies is necessary to guard against the extreme ampli- tude of vibrations resulting from resonance. Summarizing, in most cases it is necessary to have a mathemat- ical model of the ship that will predict mode shapes and frequen- cies. If the structural form of the vessel is simple and the beam analogy is applicable, the model can be simple, but as the struc- tural complexity of the vessel grows, the size of the model must grow until a full finite element analysis is required. The proper- ties of this model can then be changed to predict an efficient way of reducing vibrations. If the ship has already been built, field measurements can be taken and the model changed to duplicate them, allowing its use with great- er confidence to predict the future behavior of a modified vessel. Dr. Hooley illustrated his lec- ture with the use of blackboard, slides, and some very effective, simple, models. Discussers were Paul H. Diehl, Robert B. Grant, and Clair W. Wakefield. The meeting was attend by 76 members and guests. A copy of the paper is avail- able from the Section librarian. With the men busy at the tech- nical session, the wives attended a sherry party in the hospitality suite. Saturday afternoon's recre- ational activities consisted of a golf tournament, curling bonspiel and bridge, with prizes presented by their respective organizers. A banquet and dance was held in "Caesar's Forum," preceded by a congenial reception and cocktail hour. The Society president, Mr. Young, addressed the dinner meet- ing and presented a certificate of appreciation to Dr. Hooley. The guest speaker, the Honor- able Jack Davis, welcomed the members from the United States, and delivered a timely speech di- rected toward the impact of the energy crisis on the marine indus- try. Mr. Davis outlined the back- ground of events and philosophies leading to international recogni- tion of the general principle of the 200-mile coastal limit. The zones created within the limits come under national jurisdiction as resource management zones, including fishing and mineral ex- ploitation, both on the seabed and under it. Thus Canada, with the second longest coastline in the world, has an enormous responsi- bility to effectively manage this huge area. Great opportunities exist in both Canada and the United States, particularly for offshore oil and gas exploration and development. Mr. Davis stressed that marine transportation of crude petroleum is generally the cheapest means of moving oil, with the notable exception of certain pipelines, and that more than 50 percent of ocean tonnage is devoted to oil. Thus, the impact of worldwide demands for energy will neces- sarily be reflected in activity in the marine industry. On the West Coast, energy requirements in mid-continent will result in the construction of pipelines, and the effect of these projects, as well as the movement of oil from overseas to West Coast ports to feed into some of these pipelines, will be increased activity in the marine industry. Mr. Davis concluded on a thoughtful note by stating that the members of the engineering profession are aware of envi- ronmental consequences of their work and, in general, respond positively to provide safeguards. A china teacup and saucer were presented to each of the ladies, and door prizes were drawn, fol- lowed by an enjoyable evening of dancing. New Single Point Monitoring Salinity Control System Marine Electric RPD, Inc., has announced a new addition to the Galbraith-Pilot Marine line of Salinity Indicators. The single point monitoring salinity control system, the Sea Watch Seven, is a compact and complete solid-state salinity in- dicating and alarm system de- signed to measure and control the magnitude of impurities in treated water systems by moni- toring the quantity of salts and chlorides dissolved in water to and from evaporators and saline water conversion plants; boiler feed and condensate systems; re- actor water cooling systems and steam plants; chemical and food processing plants, and freshwater- cooled diesel engines. Offering excellent accuracy, the Sea Watch Seven Salinity Con- trol System features an all solid- state design with an internal volt- age regulator for correction of wide power line voltage fluctua- tions. High salinity alarm points are preset with a knob to a cali- brated alarm dial. A built-in tem- perature compensation circuit permits accurate readings over the full scale. The control panel of the Sea Watch Seven includes a power-on indicator lamp, high - salinity alarm indicator, power input off- on control, alarm-setting dial, and a wide-face meter for easy read- ing. The meter precisely indicates the salinity content of the water at all times via a remotely in- stalled sensor cell. A six-foot three-wire conductor is included with the sensor cell unit for di- rect or indirect connection to the control panel. Complete specifications may be obtained by writing to Harry Parke, Marine Electric RPD, Inc., 166 National Road, Edison, N.J. 08817. 20 Maritime Reporter/Engineering News
