The accuracy of measurement of the distance between underwater object using hydroacoustic modems

The article presents the results of research on the accuracy of measurement of the distance between underwater objects in conditions of under-ice sea trials. The time of signal propagation was measured using the underwater acoustic modem designed by the authors of the article. The coordinates of the underwater transducers were determined with the help of the satellite navigation system DGPS. Considered is the series of measurements of the time of signal propagation between the control points situated at different distances. Optimum performance was determined for various propagation conditions.