Portugal’s Maritime Expansion – Navigation before the Discoveries

Navigation before the discoveries was a crucial period in maritime history, marked by innovations and adaptations that paved the way for the great explorations of the 15th century.

During this time, Portuguese navigators began to improve their navigation techniques, developing more agile and resistant vessels, such as caravels, which became symbols of the age of discovery.

The influence of the Portuguese kings, together with growing maritime traffic and trade with other European nations, contributed to a significant evolution in the navy.

This context not only facilitated the exploration of new trade routes, but also laid the foundations for future expeditions that would change the course of history.

Portugal's Maritime Expansion - Navigation before the Discoveries
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Portugal's Maritime Expansion - Navigation before the Discoveries

The Influence of Portuguese Kings on the Evolution of Navigation

1. The Influence of Portuguese Kings

Under the leadership of Henry the Navigator, John II, and Manuel I, the Portuguese navy underwent significant improvements, preparing for the discoveries that would write important pages in world history.

2. Developments in the 12th Century

In the 12th century, King Sancho I ordered the construction of ‘shelter structures’ on beaches to ground ships.

3. The Reign of King Dinis

During the reign of King Dinis, when maritime traffic with other European countries was already relatively intense, the Port of Paredes was built and the Leiria pine forest was planted, which provided wood for shipbuilding.

At that time, the first Portuguese admiral, Nuno Fernandes Cogominho, was appointed, and the Genoese Pezagno was hired to fill this position.

The arrival of the Portuguese in the Canary Islands also dates from this period, according to the later statement by Afonso IV to the Pope.

4. Protection of the Merchant Navy

The merchant navy received even more official protection during the reign of King Fernando I.

As documented in Fernão Lopes’ Chronicle, shipbuilding was widely encouraged through tax exemptions and the granting of advantages and guarantees to shipowners.

This resulted in the development of maritime trade, with Portugal exporting agricultural products and importing textiles and manufactured goods.

Revenues from the Lisbon Customs House increased significantly, making it a free port frequented by numerous foreigners.

5. The Evolution of Navigation

Thus, by the beginning of the 15th century and the period of discovery, Portuguese navigation had already evolved beyond the old types of single-masted galleys, which had 16 rows of oarsmen, whether fishermen or prisoners.

Even the two-masted galleys, with 25 to 30 rowing benches, including captives, had castles at the bow and stern, from which darts, spears, arrows and incendiary materials were launched in the naval campaigns of the time.

Barges, boats and, finally, caravels began to be used, which played a crucial role in the new cycle initiated by Prince Henry, as we shall see.

Willy Sievert

Written by Willy Sievert

Editor of Bahia.ws since its founding in 2009. Based in Salvador, he travels frequently across the Northeast and all of Brazil to keep the guides up to date. Learn more about Willy Sievert →

Published on 26/09/2025 · Updated on 26/09/2025

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