This diagram image could be re-created using vector graphics as an SVG file. This has several advantages; see Commons:Media for cleanup for more information. If an SVG form of this image is available, please upload it and afterwards replace this template with {{vector version available|new image name}}.
It is recommended to name the SVG file “Marteloio of Ramon Llull.svg”—then the template Vector version available (or Vva) does not need the new image name parameter.
This diagram image was uploaded in the JPEG format even though it consists of non-photographic data. This information could be stored more efficiently or accurately in the PNG or SVG format. If possible, please upload a PNG or SVG version of this image without compression artifacts, derived from a non-JPEG source (or with existing artifacts removed). After doing so, please tag the JPEG version with {{Superseded|NewImage.ext}} and remove this tag. This tag should not be applied to photographs or scans. If this image is a diagram or other image suitable for vectorisation, please tag this image with {{Convert to SVG}} instead of {{BadJPEG}}. If not suitable for vectorisation, use {{Convert to PNG}}. For more information, see {{BadJPEG}}.
Summary
DescriptionMarteloio of Ramon Llull.jpg
English: The Rule of Marteloio as described by Majorcan scholar Ramon Llull in his Arbor Scientiae (1295). From A, the ship's intended course is SE (violet), but actual course is E (blue). Calculating the miliaria di mari (advance on intended course) follows the formula:
gain on intended course = distance on actual course × cosine of the angle of deviation.
As angle = 45 degrees, then after 100 miles on actual course, ship gains 70.71 on intended course; after 200 miles, gains 141.42 miles, and so on.
to share – to copy, distribute and transmit the work
to remix – to adapt the work
Under the following conditions:
attribution – You must give appropriate credit, provide a link to the license, and indicate if changes were made. You may do so in any reasonable manner, but not in any way that suggests the licensor endorses you or your use.
share alike – If you remix, transform, or build upon the material, you must distribute your contributions under the same or compatible license as the original.
Permission is granted to copy, distribute and/or modify this document under the terms of the GNU Free Documentation License, Version 1.2 or any later version published by the Free Software Foundation; with no Invariant Sections, no Front-Cover Texts, and no Back-Cover Texts. A copy of the license is included in the section entitled GNU Free Documentation License.http://www.gnu.org/copyleft/fdl.htmlGFDLGNU Free Documentation Licensetruetrue
You may select the license of your choice.
Captions
Add a one-line explanation of what this file represents
{{Information |Description ={{en|1=The Rule of Marteloio as described by Majorcan scholar Ramon Llull in his ''Arbor Scientiae'' (1295). From A, the ship's intended course is SE (violet), but actual course is E (blue). Calcula