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Charting a course with a compass meant using the compass drawn on the chart (called a compass rose) to draw a straight line from departure to destination.
Portuguese map-maker Pedro Reinel first drew the the fleur-de-lis indicating north on the now-standard 32 point compass rose . He also used a cross to show east (toward the Holy Land). See where Reinel's son Jorge drew the compass rose on the black and white version (below right).
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See how easy it would be to make a mistake (and get
lost at sea) using the traditional Mediterranean line
compass from 1440.
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Reinel drew the largest compass rose on West Africa, allowing pilots to plot courses in either the North or South Atlantic Oceans. |
