Project LRAPP Test Bed. Technology Used in the Development of Deep-Ocean Stable Platform
2006
Gregory, John B.
The LRAPP (Long-Range Acoustic Propagation Project) Test Bed represented the first successful deep-ocean implantment of an instrumented stable suspended array. Though the array short-circuited 5 days after implantment, 14 months later acoustic means verified it to be in the installed position. The Test Bed was an instrumented, tensioned structural system composed of many general-purpose marine components and subsystems, but its overall design concept was a system comprising three major subsystems: the hydromechanical subsystem, the sensor and electronic subsystem, and the implantment subsystem. In optimizing the system, compromises were required in the subsystems because of schedule limitations, available funding, and restriction to existing technology. The first two of these limitations were clearly required, but the restriction to existing technology is not always so clear. Whereas the subsystems and components of the Test Bed appeared to be within the bounds of technology and were satisfactorily tested ashore, a fully successful installation was not forthcoming without incorporating technological gains. This report discusses the technology used in the Test Bed and identifies the areas wherein technological gains either have since been made or need to be implemented. Successful implantments in the deep ocean can be achieved by designing lightweight structures and performing research and development of such moors from the systems viewpoint.
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