FIELD: fish catching equipment. SUBSTANCE: trawl has net, pen and rope parts, trawl boards and acoustic emitting system for generating acoustic concentrating field within trawl working zone. Acoustic emitting system has two emitter units of trawl board, emitter unit for upper seine rope and emitter unit for lower seine rope. Their front emission acoustic converters have variable suppression level of rear (reverse) side for regulating acoustic field intensity of back emission depending on retaining characteristics of cable, rope and net parts of trawl. EFFECT: increased fish yield without increase in catching young fish and improved trawl ecological cleanliness. 1 dwg
| Title | Year | Author | Number |
|---|---|---|---|
| TRAWL | 1999 |
|
RU2151504C1 |
| FISHING TRAWL | 1997 |
|
RU2122788C1 |
| METHOD FOR DETERMINATION OF TRAWL CATCH EFFICIENCY | 2007 |
|
RU2346432C1 |
| 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 |
| DEVICE PREVENTING FISH FROM LEAVING TRAWL | 2007 |
|
RU2343704C1 |
| METHOD TO DEFINE SELECTIVITY OF TRAWL NET | 2012 |
|
RU2483535C1 |
| 0 |
|
SU527170A1 | |
| TRAWL SYSTEM FOR FISHING AT VARIOUS DEPTHS | 0 |
|
SU1327862A1 |
| METHOD FOR ASSESSMENT OF TRAUMATISM OF FISHES PASSING THROUGH TRAWL NETTING | 1991 |
|
RU2007914C1 |
