FIELD: commercial fishery. SUBSTANCE: apparatus has trawl and carrier disposed behind trawl and provided with acoustic emitter creating fish barrier field. Emitter has narrow-directional hydroacoustic antenna and antenna excitation unit. Trawler has acoustic receiving-emitting device, carrier-vertical sensor, amplifier for receiving signals from trawler, signal-command decoder, program unit and hydroacoustic antenna power amplifier. Power amplifier output and amplifier input are connected to antenna outputs. Amplifier and program unit are equipped with members for blocking their output signals, whose inphase inputs are connected with vertical sensor output, which serves gate for supplying control signals to power amplifier input. EFFECT: increased efficiency in trawl catching of fish and enhanced reliability in operation. 2 cl, 4 dwg
| Title | Year | Author | Number |
|---|---|---|---|
| ACOUSTIC CONCENTRATOR FOR TRAWL FISH CATCHING | 2000 |
|
RU2169465C1 |
| FISHING TRAWL | 2000 |
|
RU2185729C2 |
| TRAWL FOR FISHING IN BOTTOM ZONE | 2003 |
|
RU2239998C1 |
| DEVICE PREVENTING FISH FROM LEAVING TRAWL | 2007 |
|
RU2343704C1 |
| METHOD FOR DETERMINATION OF TRAWL CATCH EFFICIENCY | 2007 |
|
RU2346432C1 |
| FISHING TRAWL | 1997 |
|
RU2122788C1 |
| METHOD OF DETERMINING TRAWL CATCHING EFFICIENCY | 2010 |
|
RU2440589C2 |
| METHOD OF DETERMINATION OF POSITION OF TRAWL RELATIVE TO SHOAL OF FISH IN COURSE OF TRAWLING | 1992 |
|
RU2061369C1 |
| FISH TRAWLING DEVICE | 1993 |
|
RU2048095C1 |
| FISH CATCHING TRAWL | 1998 |
|
RU2140736C1 |
