Citations:plane sailing

Usage notes
The heart of the technique is finding the departure from the results obtained by assuming that the earth's surface is flat. This seems commonly forgotten and a definition often given is "navigation using the assumption that the earth's surface is flat". Justification can be found in The analectic magazine 1817.
 * The above usage note was used to justify having two separate definitions, “A technique for navigation using planar geometry” and (proscribed) “A technique for navigation using the assumption the Earth is flat”, but the 1817 article is a review of a mathematical work by Jeremiah Day and it appears that it was only Day who denied that plane sailing is founded on the principles of the plane chart, and who then developed a different sense of the term. The OED definition (updated 2006) and quotations appear to support only the definition “A technique for navigation using the assumption that the journey occurs over a plane or flat surface rather than the actual curved surface of the Earth, which is sufficiently accurate over short distances”. — Sgconlaw (talk) 17:29, 6 June 2024 (UTC)