Analytical expressions are given for the two main effects of ship motion on the detection performance of a sonar: attenuation and distortion of sonar echoes. Regarding attenuation for a ship with an unstabilized transducer, graphs are presented in which the minimum, maximum, and mean loss are plotted as a function of the amplitude of the ship movement. For the distortion, formulas were derived for the maximum frequency spread and optimum length of a tone pulse. On the basis of actual ship motion data, an estimate is made of the optimum pulse length for the worst case situation.
Effect of Ship Motion on Sonar Detection Performance
1976
28 pages
Report
No indication
English
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