FR1027967A - Method and device for locating schools of fish or the like - Google Patents

Method and device for locating schools of fish or the like

Info

Publication number
FR1027967A
FR1027967A FR1027967DA FR1027967A FR 1027967 A FR1027967 A FR 1027967A FR 1027967D A FR1027967D A FR 1027967DA FR 1027967 A FR1027967 A FR 1027967A
Authority
FR
France
Prior art keywords
schools
fish
locating
locating schools
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
Other languages
French (fr)
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.)
ELAC Electroacustic GmbH
Original Assignee
ELAC Electroacustic GmbH
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 ELAC Electroacustic GmbH filed Critical ELAC Electroacustic GmbH
Application granted granted Critical
Publication of FR1027967A publication Critical patent/FR1027967A/en
Expired legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
    • G01S15/00—Systems using the reflection or reradiation of acoustic waves, e.g. sonar systems
    • G01S15/88—Sonar systems specially adapted for specific applications
    • G01S15/96—Sonar systems specially adapted for specific applications for locating fish

Landscapes

  • Engineering & Computer Science (AREA)
  • Radar, Positioning & Navigation (AREA)
  • Remote Sensing (AREA)
  • Physics & Mathematics (AREA)
  • Acoustics & Sound (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • General Physics & Mathematics (AREA)
  • Measurement Of Velocity Or Position Using Acoustic Or Ultrasonic Waves (AREA)
FR1027967D 1949-07-19 1950-07-19 Method and device for locating schools of fish or the like Expired FR1027967A (en)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
DE944477T 1949-07-19
DEE904A DE940034C (en) 1949-07-19 1950-03-30 Echosounder system with display through a brown tube
DEE1173A DE951136C (en) 1949-07-19 1950-05-12 Method and device for echo sounding with underwater sound using a Braun tube as display device
DEE1328A DE950053C (en) 1949-07-19 1950-06-12 Device for echo sounding with underwater sound with acoustic display

Publications (1)

Publication Number Publication Date
FR1027967A true FR1027967A (en) 1953-05-18

Family

ID=42791097

Family Applications (1)

Application Number Title Priority Date Filing Date
FR1027967D Expired FR1027967A (en) 1949-07-19 1950-07-19 Method and device for locating schools of fish or the like

Country Status (4)

Country Link
BE (1) BE503067A (en)
DE (4) DE944477C (en)
FR (1) FR1027967A (en)
GB (1) GB711469A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3035245A (en) * 1955-04-27 1962-05-15 Jr Louis R Padberg Echo ranging system

Families Citing this family (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE975073C (en) * 1953-12-17 1961-08-03 Atlas Werke Ag Circuit arrangement for an echo-sounder display device
DE1211518B (en) * 1955-04-05 1966-02-24 Phil Nat Siegfried Fahrentholz Calibratable acoustic echo sounder device and method of using it
DE1087051B (en) * 1955-05-02 1960-08-11 Electroacustic Gmbh Device for displaying the direction and distance of an object with underwater sound on the screen of a cathode ray tube
DE1141567B (en) * 1956-08-20 1962-12-20 Phil Nat Siegfried Fahrentholz Echosounder device with a luminescent Braun tube
NL227488A (en) * 1957-05-03
DE1272186B (en) * 1957-10-04 1968-07-04 Dr Siegfried Fahrentholz Echosounder device with display of the echo on a cathode ray tube
DE1153300B (en) * 1958-12-11 1963-08-22 Phil Nat Siegfried Fahrentholz Echosounder device with at least one Braun tube
DE1289460B (en) * 1963-12-18 1969-02-13 Smith & Sons Ltd S Echosounder for underwater sound
SE456372B (en) * 1984-04-06 1988-09-26 Bt Ind Ab PROCEDURE TO HAVE AN OPERATOR-FREE MACHINE DETECTING DIFFICULTIES

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1648058A (en) * 1925-11-25 1927-11-08 American Telephone & Telegraph Electrovision
GB467997A (en) * 1935-12-27 1937-06-28 Marconi Wireless Telegraph Co Improvements in or relating to echo sounding apparatus
DE767425C (en) * 1939-05-14 1952-08-28 Atlas Werke Ag Method and device for determining the direction and distance of objects using the echo method
US2473974A (en) * 1944-05-18 1949-06-21 Schuck Oscar Hugo Underwater sound detecting and indicating system
US2484618A (en) * 1944-08-26 1949-10-11 Bell Telephone Labor Inc Wave receiving system

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3035245A (en) * 1955-04-27 1962-05-15 Jr Louis R Padberg Echo ranging system

Also Published As

Publication number Publication date
DE951136C (en) 1956-10-25
DE940034C (en) 1956-03-08
BE503067A (en) 1951-05-31
DE944477C (en) 1956-06-14
GB711469A (en) 1954-07-07
DE950053C (en) 1956-10-04

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