In the latest Age of Invention newsletter, Anton Howes considers some of the technological innovations which helped English sailors to overcome powerful adversaries of the Spanish and Portuguese navies in the late 1500s and early 1600s:

Stern view of a model of the Revenge as an example of a race-built galleon, 1577.
Image from modellmarine.de

Apart from the adoption and refinement of celestial navigation techniques, however, English seafaring capabilities also benefited from some more obvious, physical changes. In 1588, for example, on the eve of the Spanish Armada, a senior Spanish officer believed that the English had “many more long-range guns”. By the 1540s, medieval ironmaking techniques involving the blast furnace had gradually spread from Germany, to Normandy, and thence to the Weald of Sussex and Kent. Whereas in the first half of the sixteenth century England had typically imported three quarters of its iron from Spain, by 1590 it had not only quintupled its consumption of iron but was also almost entirely self-sufficient. And by allowing England to exploit its plentiful domestic deposits of iron, the blast furnace resulted in it producing many more cheap cannon.

Iron guns were in many ways worse for ships than those of bronze. They were heavier, prone to corrosion, and more likely to explode without warning. Bronze guns, by contrast, would first bulge and then split, but in any case tended to last. When the British captured Gorée off the coast of Senegal in 1758, they found a working English-made bronze cannon that dated from 1582. Yet iron was only 10-20% the price of bronze. Although the Royal Navy for decades continued to prefer bronze, cheap, medium-sized cannon of iron proliferated, becoming affordable to merchants, pirates, and privateers — a situation that was unique to England.

English ships were thus especially well-armed, allowing them to access new markets even when they sailed into hostile waters. They were soon some of the only merchants able to hold their own against the latest Mediterranean apex predator, whether it be the Spanish navy, Algeria-based corsairs, or Ottoman galleys. And they were able to insert themselves, sometimes violently, into the inter-oceanic trades — all despite the armed resistance of the Spanish and Portuguese, who had long monopolised those routes. In the 1560s, John Hawkins tried a few times to muscle in on the transatlantic Portuguese and Spanish trade in slaves. With backing from the monarch and her ministers, he captured Portuguese slave ships, raided and traded along the African coastline himself, and then sold slaves in the Spanish colonies of the Americas, sometimes having to attack those colonies before the local governor would allow them to trade. (The attempt was ultimately unsuccessful, as Hawkins’s privateering fleet was all but destroyed in 1568 and the English were not involved in the slave trade again for almost a century.)

The English hold over the hostile markets was only threatened during times of peace on the continent, when their ships’ defensiveness no longer gave them a special advantage. The Dutch usurped English dominance of the trade with Iberia and the Mediterranean, for example, during the Dutch Republic’s truce with Spain 1609-21. Their more efficient ships, especially for bulk commodities — the fluyt invented at Hoorn in the late 1580s — were cheaper to build, required fewer sailors, and were easier to handle. But these advantages only made them competitive when the risk of attack was low, as they were hardly armed. When wars resumed, the English had a chance to regain their position.

Finally, the English acquired a few further advantages when it came to ship design. Thanks to the shipwright Matthew Baker, who had been on the trial voyage Cabot dispatched to the Mediterranean, England experienced a revolution in using mathematics to design ships. Baker’s methods, seemingly developed in the 1560s, allowed him to more cheaply experiment with new forms, and by the 1570s these began to bear fruit. The old ocean-going carracks and galleons, with their high forecastles and aftercastles, became substantially sleeker. Taking inspiration from nature, Baker designed a streamlined, elongated hull modelled below the waterline upon a cod’s head with a mackerel tail. Above the waterline, too, he lowered the forecastle and set it further back, as well as flattening the aftercastle.

Starting in 1570 with his prototype the Foresight, and more fully developed in 1575-77 with the Revenge, these razed or “race-built” galleons gave the English some significant advantages. Drake even chose the Revenge as his flagship to battle the Spanish Armada in 1588, and to lead an ill-fated reprisal invasion of Portugal the following year. The higher castles of carracks and old-style galleons were suited to clearing an enemy’s decks with arrows and gunfire, as well as to defend against boarders. They were designed for combat at close quarters, in which height was an advantage. They were floating fortresses, their imposing height known to inspire terror. The race-built galleons, by contrast, by making the ship less top-heavy, could have longer and lower gundecks, with more of the ship’s displacement devoted to ordnance — especially useful when taking advantage of the cheaper but heavier cannon made of iron. Rather than killing an enemy ship’s sailors and soldiers, the race-built galleons were optimised for blasting through its hull. What they lost in “majesty and terror”, they made up for with overwhelming firepower. They aimed to sink.