GB1221169A - Method and apparatus for trimming trawl nets - Google Patents
Method and apparatus for trimming trawl netsInfo
- Publication number
- GB1221169A GB1221169A GB4519669A GB4519669A GB1221169A GB 1221169 A GB1221169 A GB 1221169A GB 4519669 A GB4519669 A GB 4519669A GB 4519669 A GB4519669 A GB 4519669A GB 1221169 A GB1221169 A GB 1221169A
- Authority
- GB
- United Kingdom
- Prior art keywords
- net
- trawl
- trimming
- sept
- information
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
- 238000000034 method Methods 0.000 title abstract 3
- 238000009966 trimming Methods 0.000 title 1
Classifications
-
- A—HUMAN NECESSITIES
- A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
- A01K—ANIMAL HUSBANDRY; AVICULTURE; APICULTURE; PISCICULTURE; FISHING; REARING OR BREEDING ANIMALS, NOT OTHERWISE PROVIDED FOR; NEW BREEDS OF ANIMALS
- A01K73/00—Drawn nets
- A01K73/02—Trawling nets
Landscapes
- Life Sciences & Earth Sciences (AREA)
- Environmental Sciences (AREA)
- Animal Husbandry (AREA)
- Biodiversity & Conservation Biology (AREA)
- Length Measuring Devices Characterised By Use Of Acoustic Means (AREA)
- Measurement Of Velocity Or Position Using Acoustic Or Ultrasonic Waves (AREA)
Abstract
1,221,169. Trawling. FRIED. KRUPP G.m.b.H. 12 Sept., 1969 [13 Sept., 1968], No. 45196/69. Heading A1A. [Also in Division H4] A method of controlling the trim of a trawl net by adjusting the length of the trawl warps employs an acoustic method for determining the symmetry of the net. By measuring distances c and c<SP>1</SP> between reference points A, B and A, B<SP>1</SP> respectively using acoustic transducers, information on the spatial arrangement of the net is obtained. To help in the interpretation of this information a triangular calculating device, Fig. 2 (not shown), may be provided. An alternative arrangement employs 4 transducers B B<SP>1</SP>, C C<SP>1</SP>, Fig. 3 (not shown).
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19681782537 DE1782537A1 (en) | 1968-09-13 | 1968-09-13 | Method and apparatus for trimming fishing trawls |
Publications (1)
Publication Number | Publication Date |
---|---|
GB1221169A true GB1221169A (en) | 1971-02-03 |
Family
ID=5705093
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB4519669A Expired GB1221169A (en) | 1968-09-13 | 1969-09-12 | Method and apparatus for trimming trawl nets |
Country Status (4)
Country | Link |
---|---|
CA (1) | CA931751A (en) |
DE (1) | DE1782537A1 (en) |
GB (1) | GB1221169A (en) |
NO (1) | NO129177B (en) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0609472A1 (en) * | 1993-02-02 | 1994-08-10 | MWB MOTORENWERK BREMERHAVEN GmbH | Registration of the catch on board of fishing vessels |
WO2010090526A1 (en) * | 2009-02-03 | 2010-08-12 | Henning Skjold-Larsen | Method for determining difference in distance |
CN102388846A (en) * | 2011-07-27 | 2012-03-28 | 大连獐子岛渔业集团股份有限公司 | Trawl net for double-surface spring-tooth shellfish |
-
1968
- 1968-09-13 DE DE19681782537 patent/DE1782537A1/en active Pending
-
1969
- 1969-08-30 NO NO347669A patent/NO129177B/no unknown
- 1969-09-12 GB GB4519669A patent/GB1221169A/en not_active Expired
- 1969-09-12 CA CA061842A patent/CA931751A/en not_active Expired
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0609472A1 (en) * | 1993-02-02 | 1994-08-10 | MWB MOTORENWERK BREMERHAVEN GmbH | Registration of the catch on board of fishing vessels |
WO2010090526A1 (en) * | 2009-02-03 | 2010-08-12 | Henning Skjold-Larsen | Method for determining difference in distance |
US9119383B2 (en) | 2009-02-03 | 2015-09-01 | Henning Skjold-Larsen | Method for determining difference in distance |
CN102388846A (en) * | 2011-07-27 | 2012-03-28 | 大连獐子岛渔业集团股份有限公司 | Trawl net for double-surface spring-tooth shellfish |
Also Published As
Publication number | Publication date |
---|---|
NO129177B (en) | 1974-03-11 |
DE1782537A1 (en) | 1971-09-09 |
CA931751A (en) | 1973-08-14 |
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