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sients. Modeling is founded on basic thermodynamic and fluid flow prin- ciples, aided by empirical relation- ships as necessary. Equations for several engine variations are pre- sented, and evaluation of their con- stants from engine performance data is outlined. Paper No. 2—"Two State-of-the- Art Specialty Products Ships: De- sign, Construction, and Operation," by Robert X. Caldwell, Mau- rice Gordon, and Dwight H. Koops. SYNOPSIS—In 1979, Exxon Ship- ping Company decided to replace four aging specialty product tankers with modern equipment. Diesel power was selected because of inher- ent economies and simplicity of op- eration. This paper traces the devel- opment of the ships' design, with particular emphasis on the cargo and related systems. It also explores the contractual relationship be- tween the owner and the shipyard. Paper No. 3—"Semisubmersible Wind Loads and Wind Effects," by J. Michael Macha and Dale F. Reid. SYNOPSIS—This paper presents the results of a comprehensive in- vestigation of wind effects on a con- temporary semisubmersible drilling vessel design. Wind loads were measured on a wind tunnel model as a function of draft, heading, inclina- tion, and deck arrangement. Scale and lift effects, and effects related to the representation of the sea sur- face were critically analyzed. The measured wind loads were com- pared with loads obtained using two classification society procedures. Paper No. 4—"The High-Speed Displacement Ship Systematic Se- ries Hull Forms: Seakeeping Char- acteristics," by Wim Beukelman and Jan J. Blok. SYNOPSIS—A systematic series of high-speed hull forms has been model tested at the Maritime Re- search Institute in the Netherlands. The series has been designed to pos- sess both good calm water resistance properties and to have favorable seakeeping characteristics. This pa- (continued on page 50) The Best Radar Training .Now Available on an Individual Basis USCG approved one-day radar observer endorsement renewal at the MarineSafety Simulator Center. Radar plotting practice and maneuvering decision-making on realistic, interactive ships bridges. • Both coastwise and offshore exercises • Practice in data analysis and vessel maneuvering in complex collision avoidance situations • The same licensed, experienced, instructors who conduct MarineSafety's courses for major shipping companies • Meets IMC), USCG, Canadian. I.iberian and other national standards Course includes: • Guaranteed plotting proficiency to USCG standards • Individualized instruction — scheduled whenever possible to your convenience • Evaluation of personal maneuvering decision-making • Free parking — convenient to simulator center • Attendance includes right to a free refresher session for sharpening collision avoidance analysis before returning to sea • Free practice harbor approach on visual ship simulator (if time permits) Cost: $165. per person (Tax deductible) For registration call Tom Garrigan at (718) 565-4125 MarineSafety international Marine Air Terminal LaGuardia Airport, N. Y. 11371 Circle 315 on Reader Service Card 49