Student Paper Presented At SNAME Chesapeake Section

The Chesapeake Section of The Society of Naval Architects and Marine Engineers met recently at Walter Reed Army Hospital's Officers' Club to hear a paper by Richard A. Swanek and Alfred L. Dinsenhacher, both of David Taylor NSRDC, and Lt. Michael F. Flessner of the U.S. Coast Guard, on "Cargo Tank Overpressurization and P r o c e d u r e s for Vent System Evaluation and Design." Because of the number of accidents in tank vessel operations, more attention is now being given to the design and operating procedures for tanks containing liquids that produce flammable and or toxic vapors, to ensure that the safety of the ship and its personnel not be compromised.

The paper presented analytical methods for evaluating pressure buildup in marine cargo tanks so as to prevent overpressurization of these tanks. In particular, the paper addressed the loading and unloading of volatile and nonvolatile liquid cargoes carried in bulk, and provided a method for evaluating overpressurization hazards during cargo transfer operations.

The student paper presented by Robert J. Kaslner, a midshipman at the U.S. Naval Academy, discussed the harnessing of ocean wave energy through wave energy focusing using a submerged lens-shaped s t r u c t u r e . Midshipman Kastner recounted the experiment he c o n d u c t e d at the Academy, which showed that a lens-shaped structure can cause wave height magnification of 1.5 times the incident value.

Maritime Reporter Magazine, page 38, May 1980

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