Use of Sumner Lines in Navigation

Abstract

MAY I venture to point out, in the interests of navigational science, that although the article by Capt. Tizard in NATURE of July 1 under the above title is an admirably clear and concise account of the application of Sumner lines in navigation at the date given in his examples, it is scarcely descriptive of the best practice of to-day?

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BALL, J. Use of Sumner Lines in Navigation. Nature 105, 806–808 (1920). https://doi.org/10.1038/105806a0

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