GB979812A - Improvements in or relating to navigating instruments - Google Patents

Improvements in or relating to navigating instruments

Info

Publication number
GB979812A
GB979812A GB18979/61A GB1897961A GB979812A GB 979812 A GB979812 A GB 979812A GB 18979/61 A GB18979/61 A GB 18979/61A GB 1897961 A GB1897961 A GB 1897961A GB 979812 A GB979812 A GB 979812A
Authority
GB
United Kingdom
Prior art keywords
compass
instrument
zero
protractor
arms
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
GB18979/61A
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.)
DONALD HENRY TOWNSEND MAC MILL
Original Assignee
DONALD HENRY TOWNSEND MAC MILL
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 DONALD HENRY TOWNSEND MAC MILL filed Critical DONALD HENRY TOWNSEND MAC MILL
Priority to GB18979/61A priority Critical patent/GB979812A/en
Publication of GB979812A publication Critical patent/GB979812A/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
    • G01C21/00—Navigation; Navigational instruments not provided for in groups G01C1/00 - G01C19/00
    • G01C21/005—Navigation; Navigational instruments not provided for in groups G01C1/00 - G01C19/00 with correlation of navigation data from several sources, e.g. map or contour matching

Landscapes

  • Engineering & Computer Science (AREA)
  • Radar, Positioning & Navigation (AREA)
  • Remote Sensing (AREA)
  • Automation & Control Theory (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Length-Measuring Instruments Using Mechanical Means (AREA)

Abstract

979,812. Navigational instruments. D.H.T. MACMILLAN. May 21, 1962 [May 25, 1961], No. 18979/61. Heading G1X. The compass bearings of three fixed points A, B, C, are taken from a vessel and the arms 5, 6, 7 of a plotting instrument correspondingly adjusted relative to a 360 degrees protractor 1. By aligning the bevelled edges of arms 5, 6, 7, with the points A, B, C, on a chart, the vessel's position may be marked with a pencil through a central aperture in the instrument. By marking through an aperture 19 at the zero graduation 2 of the scale and drawing line ZZ the zero position i.e. true or magnetic north as given by the gyro or magnetic compass is determined. If a line NN is transferred from the compass rose on the map any error in the compass is determined by angle a . Each arm 5, 6, 7, is attached by screws 10 to a disc 8, adjacent discs being separated by washers 12 and locked in position, when adjusted, by nut 14. Arm 6 may be independently locked in alignment with the zero graduation 2, by screw 18 engaging an L-shaped bar 16 and protractor 1 has a second set of graduations (not shown) extending from 0 to 180 degrees each side of the zero mark 2 to facilitate the use of the instrument as a station pointer.
GB18979/61A 1961-05-25 1961-05-25 Improvements in or relating to navigating instruments Expired GB979812A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB18979/61A GB979812A (en) 1961-05-25 1961-05-25 Improvements in or relating to navigating instruments

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB18979/61A GB979812A (en) 1961-05-25 1961-05-25 Improvements in or relating to navigating instruments

Publications (1)

Publication Number Publication Date
GB979812A true GB979812A (en) 1965-01-06

Family

ID=10121715

Family Applications (1)

Application Number Title Priority Date Filing Date
GB18979/61A Expired GB979812A (en) 1961-05-25 1961-05-25 Improvements in or relating to navigating instruments

Country Status (1)

Country Link
GB (1) GB979812A (en)

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