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Plotting a Position Line Without Reference to an Azimuth

Published online by Cambridge University Press:  18 January 2010

Extract

The following method of drawing a position line from a celestial observation is suggested as a possible means of simplifying a small portion of the navigator's work. It avoids the use of azimuths, thereby simplifying chart work.

The method is based on a geometrical construction whereby the position line is determined from intercepts relating to two separate adjacent Assumed Positions; this construction may prove simpler than the present orthodox method, particularly as it does not involve the measurement of angles.

Type
Research Article
Copyright
Copyright © The Royal Institute of Navigation 1951

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References

REFERENCES

1Benest, E. E., and Timberlake, E. M. (1945). Astro-navigation Tables for the Common Tangent Method, Heffer, Cambridge.Google Scholar
2Aquino, F. Radler de (1938). Lines of position determined without azimuths, ‘Universal’ Sea and Air Navigation Tables, U.S. Naval Institute.Google Scholar