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In navigation, a rhumb line, rhumb (/ r ʌ m /), 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.
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 .
overlapping rhumb lines completely covering the chart. These lines emanate from a circle (or double circle) of thirty-two-point compass roses spaced around the chart and color coded, with the eight primary directions black, the eight between them green, and the remaining sixteen red. These rhumb lines formed a base for specifying the
The Spanish term for ships of the line was navíos, but during the latter part of the Habsburg era (until 1700) ships continued to be designated as galeón.
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.
Many of the best pages in the history of Spain –and some of those that have contributed most to the progress of humankind– have been written on the deck of Spanish ships.
The simplest way for you to understand the concept of a Great Circle route is to take a piec e of string to a globe. If you put one end at the origin and the other at the destination and held it straight, paral lel with the equator, you will get one distance known as the ‘ Rhumb Line ’.
