GB1221169A - Method and apparatus for trimming trawl nets - Google Patents

Method and apparatus for trimming trawl nets

Info

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
Application number
GB4519669A
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Fried Krupp AG
Original Assignee
Fried Krupp AG
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Fried Krupp AG filed Critical Fried Krupp AG
Publication of GB1221169A publication Critical patent/GB1221169A/en
Expired legal-status Critical Current

Links

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).
GB4519669A 1968-09-13 1969-09-12 Method and apparatus for trimming trawl nets Expired GB1221169A (en)

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)

* Cited by examiner, † Cited by third party
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

Cited By (4)

* Cited by examiner, † Cited by third party
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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