Measuring and testing – Navigation – Take-off and landing monitors
Patent
1977-10-03
1978-08-22
Woodiel, Donald O.
Measuring and testing
Navigation
Take-off and landing monitors
G01C 2110
Patent
active
041079884
ABSTRACT:
A navigation aid for sailing vessels which provides a continuous indication of the actual progress towards a selected position or goal, such as a course mark in a sailboat or yacht race, is described. The actual progress is indicated in terms of speed made good and/or distance made good so as to enable immediate evaluation of the effect of course changes and variations in vessel performance. The speed of the sailing vessel through the water is detected and an output signal proportional thereto is obtained. A sensor which is responsive to deviations from the direct course to the goal and which may be positioned in azimuth in accordance with that course is also provided. This sensor may be a Hall effect generator which is responsive to the earth's magnetic field as well as to the output signal from the speed detector and provides an output which is proportional to the product of the speed and the cosine of the angle between the course being sailed and the course to the goal. This output is utilized for the continuous indication of the speed made good by the vessel or may be integrated to indicate the distance made good.
REFERENCES:
patent: 3685352 (1972-08-01), Pounder et al.
Lukacher Martin
Woodiel Donald O.
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