Page 35: of Maritime Reporter Magazine (November 1973)

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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