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Information from Electric Currents in the Sea

Published online by Cambridge University Press:  18 January 2010

G. E. R. Deacon
Affiliation:
(Director, National Institute of Oceanography)

Extract

Waves, tides and ocean currents might not be expected to produce electric currents, but by moving water, as a conductor, through the Earth's magnetic field they do in fact produce measurable voltages and flows of electricity. Young, Gerrard and Jevons, who made the first detailed study of this phenomenon, thought it conceivable that measurements of electric potential gradient might be used to estimate the drift of a ship at sea, and Von Arx showed how indications from electrodes towed behind the Research Vessel Atlantis were used to keep her on a direct course from Bermuda to Woods Hole, across the Gulf Stream. In recent years the method has been used extensively in studies of ocean currents and more ships might use it if the necessary equipment were readily available.

Type
Research Article
Copyright
Copyright © The Royal Institute of Navigation 1955

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References

REFERENCES

1Young, F. B., Gerrard, H., and Jevons, W. (1920). On electrical disturbances due to tides and waves. Phil. Mag., Ser. 6, 40, 149.CrossRefGoogle Scholar
2Von Arx, W. S. (1951). Dead reckoning by surface current observation. This Journal, 4, 117.Google Scholar
3Bowden, K. F. (1953). Measurement of wind currents in the sea by the method of towed electrodes. Nature, Lond., 171, 735.CrossRefGoogle Scholar
4Longuet-Higgins, M. S., Stern, M. E., and Stommel, H. (1955). The electrical field induced by ocean currents and waves, with applications to the method of towed electrodes. Pap. phys. Oceanogr., 13 (3), 1.Google Scholar
5Longuet-Higgins, M. S. (1949). The electrical and magnetic effects of tidal streams. Mon. Not. R. Astr. Soc. Geophys. Suppl., 5 (8), 295.Google Scholar
6Deacon, G. E. R. (1951). Applications of oceanographical research to navigation. This Journal, 4, 276.Google Scholar
7Guelke, R. W. and Schoute-Vanneck, C. A. (1947). The measurement of sea water velocities by electromagnetic induction. J. Inst. elect. Engrs., 94 (Part II), 71.Google Scholar