CA980446A - Course difference logic - Google Patents

Course difference logic

Info

Publication number
CA980446A
CA980446A CA186,389A CA186389A CA980446A CA 980446 A CA980446 A CA 980446A CA 186389 A CA186389 A CA 186389A CA 980446 A CA980446 A CA 980446A
Authority
CA
Canada
Prior art keywords
difference logic
course difference
course
logic
difference
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
CA186,389A
Other languages
English (en)
Other versions
CA186389S (en
Inventor
John T. Fowler
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.)
Laitram LLC
Original Assignee
Laitram LLC
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 Laitram LLC filed Critical Laitram LLC
Application granted granted Critical
Publication of CA980446A publication Critical patent/CA980446A/en
Expired legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01C—MEASURING DISTANCES, LEVELS OR BEARINGS; SURVEYING; NAVIGATION; GYROSCOPIC INSTRUMENTS; PHOTOGRAMMETRY OR VIDEOGRAMMETRY
    • G01C17/00—Compasses; Devices for ascertaining true or magnetic north for navigation or surveying purposes
    • G01C17/02—Magnetic compasses
    • G01C17/04—Magnetic compasses with north-seeking magnetic elements, e.g. needles
    • G01C17/20—Observing the compass card or needle
    • G01C17/26—Observing the compass card or needle using electric pick-offs for transmission to final indicator, e.g. photocell

Landscapes

  • Engineering & Computer Science (AREA)
  • Radar, Positioning & Navigation (AREA)
  • Remote Sensing (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Control Of Stepping Motors (AREA)
  • Optical Transform (AREA)
  • Transmission And Conversion Of Sensor Element Output (AREA)
  • Electric Clocks (AREA)
  • Position Fixing By Use Of Radio Waves (AREA)
CA186,389A 1972-11-22 1973-11-21 Course difference logic Expired CA980446A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US30882372A 1972-11-22 1972-11-22

Publications (1)

Publication Number Publication Date
CA980446A true CA980446A (en) 1975-12-23

Family

ID=23195541

Family Applications (1)

Application Number Title Priority Date Filing Date
CA186,389A Expired CA980446A (en) 1972-11-22 1973-11-21 Course difference logic

Country Status (5)

Country Link
US (1) US3772503A (fr)
JP (1) JPS501769A (fr)
CA (1) CA980446A (fr)
DE (1) DE2357879C3 (fr)
GB (1) GB1409640A (fr)

Families Citing this family (18)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4146970A (en) * 1973-12-26 1979-04-03 Edwards Robert A Remote-indicating magnetic compass
US4023018A (en) * 1975-07-15 1977-05-10 Hall David J Navigation system and method
US4038528A (en) * 1975-11-10 1977-07-26 The Laitram Corporation Automatic piloting system
US4101882A (en) * 1976-05-28 1978-07-18 The Brunton Company Data read-out system and apparatus useful for angular measurements
US4095348A (en) * 1976-11-10 1978-06-20 The Brunton Company Digital compass
US4221328A (en) * 1978-07-11 1980-09-09 The Brunton Company Data read-out system and apparatus useful for angular measurements
FR2518256B2 (fr) * 1981-12-15 1988-05-27 Wache Albert Compas magnetique opto-electrique
US4611171A (en) * 1983-06-07 1986-09-09 Syntron, Inc. Location indicator for a marine seismic cable comprising operator controlled saturable core magnetometers
US4777602A (en) * 1986-06-26 1988-10-11 Sperry Marine Inc. Digital autopilot controller for marine vessels
US5010653A (en) * 1988-02-29 1991-04-30 Digicourse, Inc. Apparatus and method for determining azimuth, pitch and roll
US4843865A (en) * 1988-02-29 1989-07-04 Digicourse, Inc. Method of calibrating a compass heading
US5105548A (en) * 1988-02-29 1992-04-21 Digicourse, Inc. Apparatus and method for determining azimuth, pitch and roll
US5062061A (en) * 1990-10-25 1991-10-29 Conoco Inc. Automatic direction control for omni-directional shear wave sources
DE4113841C2 (de) * 1991-04-27 1997-01-09 Deutsche Forsch Luft Raumfahrt Einrichtung zur Messung einer translatorischen Wegänderung
US7195602B2 (en) * 2003-06-28 2007-03-27 Yong Peter A K Dual-chamber liquid receiving and containing device
CA2460709A1 (fr) * 2003-10-10 2005-04-10 Johnson Outdoors, Inc. Systeme et methode de configuration d'un compas numerique comme aide a la navigation
CN104976210A (zh) * 2014-04-11 2015-10-14 刘兴邦 双螺栓防松方法
US10438648B2 (en) * 2018-01-11 2019-10-08 Micron Technology, Inc. Apparatuses and methods for maintaining a duty cycle error counter

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3289475A (en) * 1963-08-14 1966-12-06 Ralph W Kenyon Blind flight without gyros, methods and instruments
US3337723A (en) * 1963-08-29 1967-08-22 Lee M Etnyre Integrating data converter to provide continuous representation of aircraft position
US3596069A (en) * 1969-02-13 1971-07-27 Wayne E Burt Computer-stabilized magnetic compass

Also Published As

Publication number Publication date
DE2357879B2 (de) 1979-11-22
US3772503A (en) 1973-11-13
JPS501769A (fr) 1975-01-09
DE2357879A1 (de) 1974-06-12
GB1409640A (en) 1975-10-08
DE2357879C3 (de) 1980-08-07

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