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The Most Advanced Electronic System Which Gives a Direct Reading of Shaft Horsepower, Torque, and RPM T AIRDECK pawERjhnquE • EXCELLENT ACCURACY AND REPEATABILITY • CONVENIENT SMALL SIZE • EASY TO INSTALL X ACCEPTED BY MARITIME ADMINISTRATION also available: e Total Horsepower Hour • Digital Readouts • Alarms • Torque Limiters WRITE OR CALL US TODAY FOR 30 DAYS FREE TRIAL ULTRA PRODUCTS INC. 805 Central Ave. • New Orleans, La. 70121 504/835-7191 Opportunities for Sales Representatives Call or Write us Today 2. OPEN 1. UNLOCK TIME: 30Seconds Memarco Rapid Action Deck Cover The quick, simple way to seal deck openings. Forget about cumbersome studs and nuts. Our Rapid Action Deck Cover locks and un- locks in seconds. It fits a standard 12)4" open- ing and is adjustable to any deck plate thick- ness up to 3". All bronze construction makes it non-spark- ing. Buna-N seal makes it watertight. And, best of all, its removable, special wrench makes it theft proof. Throw away your old steel plate covers and try ours. You won't be sorry. i— Mechanical Marine DIVISION HAYWARD MANUFACTURING COMPANY, INC. 900 Fairmount Ave., Elizabeth, N.J. 07207 Phone: (201) 351-5400 No. Calif. Section Discusses Systematic Sequencing For Loading/Offloading Tankers Pictured at the Engineers Club, left to right: Joseph Busch (Wickert Co.), chairman, Northern California Section; Lt. David B. Lorenz (USCG), author, and James A. Stasek (Kings Point Machinery), public relations chairman. Approximately 60 members and guests of the Northern California Section of The Society of Naval Architects and Marine Engineers at- tended a recent dinner meeting at the Engi- neers Club in San Francisco. A paper entitled "Systematic 'Sequencing for Loading and Off-Loading Tankers" was pre- sented by Lt. David B. Lorenz, USiCG, gradu- ate student, University of Michigan. Lieutenant Lorenz's paper summarized the difficulties in working out tanker loading and discharge sequences by pointing out that there are 480 million possible sequences with only 12 tanks. He outlined a computer program which se- lects acceptable loading procedures utilizing the "influence line method" traditionally used for analyzing bridge structures and recently adapted for this type of application by J. Moe at the University of Michigan. Northern California Section officers shown left to right at the meeting: William C. Webster (U.C.), secretary- treasurer; Robert Herbert (naval architect), vice chair- man; Joseph Busch (Wickert Co.), chairman, and Thomas B. Cole (American President Lines), meetings chairman. A stated purpose of the paper was to develop discussions which would allow the author to learn more about constraints and considera- tions required to develop a practical program. Discussion developed that the primary con- siderations should be time, maximum allowable hull stress acceptable to regulatory bodies and low-cycle fatigue limits. Practical usage for this program was suggested as vessels with separate ballasting facilities under 100,000 dwt carrying mutiple petroleum or chemical prod- ucts. Discussers were: Arthur Haskell, Matson Navigation ; Henry Kozlowski, American Presi- dent Lines; William Webster, U.C.; Ezio Pal- mieri, Chevron; Robert Boston, USCG; Gra- ham Frazer, Paceco; Robert Herbert, and Bert Lundegaard. November 1, 1973 41
