Marine Compass Navigation

Timeline

1. c. 1100–1250Sicily and Iberia · IberiaMagnetic needle and astrolabe technology from the Arab world reached Latin Europe through the Norman Kingdom of Sicily and Iberian translation centers; sailors began using suspended or pivoted magnetic needles on deck to indicate direction, replacing reliance on coastal landmarks and stars alone.
2. c. 1341–1350Genoa and Majorca cartographic workshops · GenoaIn the 1340s Venetian, Genoese, and Majorcan cartographers drew 32-point compass roses on portolan charts; merchant ships and warships were commonly equipped with boxed compasses, and the revival of shipping after the Black Death made compass navigation standard technology for Mediterranean–North Sea trade.
3. c. 1400–1600Indian Ocean–East Asian routes · Southeast AsiaIn the 15th–16th centuries European, Arab, and Chinese navigators each developed their own compass forms; the Portuguese caravel and Zheng He's fleet both relied on magnetic needle orientation, and the global maritime trade network made compass navigation a shared technology across civilizations.