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Waves Off Land's End

Published online by Cambridge University Press:  18 January 2010

L. Draper  and
H. S. Fricker
L. Draper
Affiliation:
National Institute of Oceanography
H. S. Fricker
Affiliation:
National Institute of Oceanography
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Extract

Since January 1962, waves have been recorded by a shipborne wave recorder (Tucker, 1956) on the Sevenstones light-vessel which is stationed about 20 miles south-west of Land's End in about 200 ft. of water. Records were taken at three-hourly intervals and were mostly of 12 minutes’ duration. The analysis presented here is based on 2920 records taken in the first year of operation; the method of analysis which has been used is that described by Tucker (1961). This gives for each record:

(a) H1 = The sum of the distances of the highest crest and the lowest trough from the mean water level.

(b) Tz = The mean zero-crossing period.

(c) Tc = The mean crest period.

Type
Research Article
Information
The Journal of Navigation , Volume 18 , Issue 2 , April 1965 , pp. 180 - 187
Copyright
Copyright © The Royal Institute of Navigation 1965

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References

Tucker, M. J. (1956). A shipborne wave recorder, Trans. Inst. nav. Archit., 98, 236.Google Scholar
Tucker, M. J. (1961). Simple measurement of wave records, Proc. Conf. wave recording for civ. Engrs. (National Institute of Oceanography), 22–3. Also printed in Dock Harb. Author, 42, 231 (1961).Google Scholar
Tucker, M. J. (1963). Analysis of Records of Sea Waves, Proc. Instn. civ. Engrs., 26, 305.Google Scholar
Cartwright, D. E. and Longuet-Higgins, M. S. (1956). The statistical distribution of the maximum of a random function, Proc. roy. Soc, A 237, 212–32.Google Scholar
Draper, L. (1963). Derivation of a ‘design wave’ from instrumental records of sea waves, Proc. Instn. civ. Engrs., 26, 291.Google Scholar
Darbyshire, Mollie and Draper, L. (1963). Forecasting wind-generated sea waves, Engineering (Land.), April 1963, 12.Google Scholar