Search results
The rhumb-line construction scheme in the Cantino planisphere. This diagram shows the latitude lines (equator, etc), as well as the position of the compass roses on the Cantino planisphere.
Rhumb line. Image of a loxodrome, or rhumb line, spiraling towards the North Pole. In navigation, a rhumb line, rhumb ( / rʌm / ), or loxodrome is an arc crossing all meridians of longitude at the same angle, that is, a path with constant bearing as measured relative to true north .
Rhumb lines. Portolan charts are characterized by their rhumbline networks, which emanate out from compass roses located at various points on the map. The lines in these networks are generated by compass observations to show lines of constant bearing.
Image of Petrus Vesconte. A rhumbline network (or windrose network) is a navigational aid consisting in multiple lines in a web-like grid drawn on portolan charts (and other early maps). These nautical charts were used in the medieval age and age of exploration in marine navigation.
9 sty 2023 · The main historical events that shaped Spain's Society easy explained. A colorful and complete infographic with Spain's history timeline for you to download for free!
Over a longer oceanic passage, it makes sense to travel on a Great Circle Circle than the Rhumb Line due to the extra time and energy involved. Sailing between Cadiz (Spain) and Miami (US), this could amount to a day’s sailing over the passage (150 NM less).
Around 1540 a debate took place between Pedro Nunes and another Portuguese scholar on the mathematical properties of rhumb lines and the making of rhumb tables. The scholar (whose name is unknown) compiled a treatise on how to draw rhumb lines on a globe on which he heavily criticized Nunes's work.
