The seaman's companion being a plain guide to the understanding of arithmetick, geometry, trigonometry, navigation, and astronomy. Applied chiefly to navigation: and furnished with a table of meridional parts, to every third minute: with excellent and easie ways of keeping a reckoning at sea, never in print before. Also, a catalogue of the longitude and latitude of the principal places in the world with other useful things. The third edition corrected and amended. By Matthew Norwood, mariner.
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Title
The seaman's companion being a plain guide to the understanding of arithmetick, geometry, trigonometry, navigation, and astronomy. Applied chiefly to navigation: and furnished with a table of meridional parts, to every third minute: with excellent and easie ways of keeping a reckoning at sea, never in print before. Also, a catalogue of the longitude and latitude of the principal places in the world with other useful things. The third edition corrected and amended. By Matthew Norwood, mariner.
Author
Norwood, Matthew.
Publication
London :: [print]ed by Anne Godbid, and John Playford, for William Fisher, at the Postern-Gate near Tower-Hill; Robert Boulter, at the Turks-Head and Ralph Smith, at the Bible in Cornhill; Thomas Passinger, at the Three Bibles on London-Bridge; and Richard Northcot, next St. Peter's-Alley in Cornhill, and at the Anchor and Mariner, on Fishstreet-Hill.
[1678]
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This text has been selected for inclusion in the EEBO-TCP: Navigations collection, funded by the National Endowment for the Humanities.
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"The seaman's companion being a plain guide to the understanding of arithmetick, geometry, trigonometry, navigation, and astronomy. Applied chiefly to navigation: and furnished with a table of meridional parts, to every third minute: with excellent and easie ways of keeping a reckoning at sea, never in print before. Also, a catalogue of the longitude and latitude of the principal places in the world with other useful things. The third edition corrected and amended. By Matthew Norwood, mariner." In the digital collection Early English Books Online 2. https://name.umdl.umich.edu/A52487.0001.001. University of Michigan Library Digital Collections. Accessed May 22, 2024.
Pages
descriptionPage 115
By the Tables.
The proportion of this and all others of this kind, is the same that holds in right angled Triangles; namely, that the Sine of every Angle is proportional to its opposite side, or every side is proportional to the Sine of its opposite Angle.
Here we have given the side C A 38 Leagues, the side A B 58 Leagues, and the Angle at C which is 5 points or 56 deg. 15 min.
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