Basic Problems in Underwater Acoustic Imaging

The basic elements of an underwater acoustic imaging system are presented. Each element that introduces serious problems in the design and construction of a practical system is discussed and known ways of solving the problems are outlined. Problems of specular reflection, range‐definition tradeoffs, size, weight, cost, lenses, deep submergence pressure, and data rate are presented. Techniques utilized in the HYDROCON system are used as illustrations of one practical embodiment of the principles of a system. Finally, new ideas are presented to suggest areas in which techniques now under development may provide solutions to some of our current problems.