Development of hydroacoustic telemetry and remote control for fishing boats

Although hydroacoustic telemetry appeared in fishing and research boats much later hydroacoustic fishfinding equipment it is now this equipment is increasingly used on fishing boats. The development of hydroacoustic telemetry in the fishing industry began in the late 1950s and early 1960s. Engineers and designers of the fishing industry have played an important role in the development of hydroacoustic fishing telemetry especially Division of Marine Electronics BaltNIRO, then NPO fishing industry. In the early 60’s, the analysis and experimental studies of the most feasible data transmission channels from the trawl to the ship were carried out. Devices for monitoring the trawl parameters of fish in their area of operation with a cable communication channel based on logging cables with automatic output and cable sampling were developed. A lot of attention was paid to the research and development of devices to control the degree of filling the trawl with fish. As a result, the instruments “Ulov and Ulov-2”, “Oberon “and further “Eridan” were developed and introduced for the first time in the practice of vessels’ work. Such devices were developed by foreign firms later. Much attention was paid to the research and development of devices for monitoring the skew and symmetry of the trawl. Acoustic telemetry can help in determining the coefficients of catchability and selectivity of fishing trawls. The development of microelectronics and multi-window display systems has contributed significantly to the development and improvement of fishery telemetry of fishing gears. Especially in recent decades trawl sonars with vertical and horizontal scanning have been developed. Specialists of our fishing industry also for the first time in the world practice created and introduced in practice instruments for controlling the characteristics of the trawl “Actinia” directly in the process of its operation using hydroacoustic control signals.