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An Historical Review of the Ex-Meridian Problem

Published online by Cambridge University Press:  18 January 2010

Charles H. Cotter
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Extract

The method of finding the latitude of a ship at sea from an observation of the Sun or other body near the meridian is practised extensively in the Merchant Navy. The history of the method, which dates from the middle of the eighteenth century, is full of interest: and the ex-meridian problem is almost as celebrated in the history of nautical astronomy as the double altitude problem. Considerable attention was devoted to the ex-meridian problem during the last century—a period which was, in truth, the golden age of astronomical navigation. Many ingenious solutions were contrived and a diversity of ex-meridian tables were constructed, all aimed at facilitating the problem of finding latitude at sea.

Type
Research Article
Information
The Journal of Navigation , Volume 17 , Issue 1 , January 1964 , pp. 72 - 82
Copyright
Copyright © The Royal Institute of Navigation 1964

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References

REFERENCES

1Robertson, J., The Elements of Navigation, 5th edition 1786 by W. Wales.Google Scholar
2Martin, W. R., Navigation and Nautical Astronomy, Ist edition 1888.Google Scholar
3Moore, J. H., The New Practical Navigator, 12th edition 1796.Google Scholar
4Norie, J. W., Complete Epitome, 4th edition 1814.Google Scholar
5Norie, J. W., Complete Epitome, 21st edition by A. B. Martin 1877.Google Scholar
6Rosser, W. H. (1885). Self Instructor in Navigation.Google Scholar
7Raper, H., Practice of Navigation, Ist edition 1840.Google Scholar
8Merrifield, J. (1886). A Treatise on Nautical Astronomy.Google Scholar
9Mackay, A. (1793). The Theory and Practice of finding the Longitude etc.; and The Complete Navigator, 2nd edition 1810.Google Scholar
10Riddle, J., Treatise on Navigation, 6th edition 1855.Google Scholar
11Inman, J., Navigation and Nautical Astronomy, 10th edition 1855.Google Scholar
12Johnson, A. C., Brief and Simple Methods of Finding Latitude and Longitude, 3rd edition 1895.Google Scholar
13Johnson, A. C., On Finding Latitude and Longitude in Cloudy Weather, 26th edition 1903.Google Scholar
14Goodwin, H. B. (1894). The Ex-Meridian treated as a problem in Dynamics etc.Google Scholar
15Robertson, J. (1772). The Elements of Navigation.Google Scholar
16White, J. (1895). Diagram for Obtaining the Reduction in Ex-meridian Altitude Observation.Google Scholar
17White, J., The Ex-Meridian Problem, Naut. Mag. 1897.Google Scholar
18Kitchin, F. (1897). Ex-meridian Diagram.Google Scholar
19Blackburne, H. S.Tables for Azimuth, Great Circle Sailing and Reduction to the Meridian, 5th edition 1918.Google Scholar
20Blackburne, H. S., ‘Excelsior’ Ex-meridian Tables, 5th edition 1927.Google Scholar
21Hall, W., Appendix to Raper's Practice of Navigation, 1914 edition.Google Scholar