GB979812A - Improvements in or relating to navigating instruments - Google Patents
Improvements in or relating to navigating instrumentsInfo
- 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
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.
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) |
-
1961
- 1961-05-25 GB GB18979/61A patent/GB979812A/en not_active Expired
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