JOURNAL ARTICLE

The Plane Scale and stereographic projection in early navigation.

  • Published In: Journal of Navigation, 2025, v. 78, n. 1. P. 20 1 of 3

  • Database: Academic Search Ultimate 2 of 3

  • Authored By: Stuart, Robin G. 3 of 3

Abstract

The Plane or Plain Scale is a navigational device that dates back to the early 1600s but has long since ceased to be used in practice. It could perform the function of a protractor and be used to solve problems in plane trigonometry. In addition, coupled with a suite of remarkable geometric constructions based on stereographic projection, the Plane Scale could efficiently solve problems in spherical trigonometry and hence navigation on a sphere. The methods used seem today to be largely unknown. This paper describes the Plane Scale and how it was used. [ABSTRACT FROM AUTHOR]

Additional Information

  • Source:Journal of Navigation. 2025/01, Vol. 78, Issue 1, p20
  • Document Type:Article
  • Subject Area:Mathematics
  • Publication Date:2025
  • ISSN:0373-4633
  • DOI:10.1017/S037346332510101X
  • Accession Number:188389269
  • Copyright Statement:Copyright of Journal of Navigation is the property of Cambridge University Press and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

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