No single boat changed the world
The title suggests a handful of small boats transformed history. The more accurate picture is that Portuguese and Spanish voyages from the fifteenth century used a mix of ship types, each suited to a particular job, and that the same names were often applied loosely. This article compares the three most often mentioned: the caravel, the carrack and the nao. The caravel and carrack are the pair most often set against each other, and the nao complicates the comparison.
The caravel
The caravel was a small, handy ship, associated especially with Portuguese exploration of the Atlantic coast of Africa in the fifteenth century. It had a shallow draft and good manoeuvrability, which made it suited to scouting unknown shores and working close to land. Early caravels carried lateen sails, triangular sails set along the length of the ship, and were good at sailing against the wind. This sort of rig had earlier roots in Mediterranean and Arab seafaring, and it is the same family of sails seen on the lateen-rigged dhow of the Indian Ocean.
Later caravels often carried square sails on some masts, a variant sometimes called a round caravel. These were better for long runs with the wind behind. The cost of a small hull was limited space. A caravel could carry only modest cargo and a small crew, so it was a ship for finding routes rather than for moving goods in bulk. Details such as exact length, tonnage and number of masts varied, and historians debate how much the surviving descriptions can be trusted.
Two of Columbus’s three ships in 1492, the Nina and the Pinta, are generally described as caravels. The Nina is usually said to have been re-rigged with square sails during the voyage or soon after, though the precise sequence is not certain.
The carrack
The carrack, called the nau in Portuguese, was a larger, heavier ship. It had a high, rounded hull, tall castles at bow and stern, and three or sometimes four masts. Its capacity made it the workhorse for long-distance cargo, especially on the route from Portugal around Africa to the Indian Ocean. Vasco da Gama’s fleet that reached India in 1498 included ships of this broad type, though they were not all the same size.
The high sides gave carracks space for goods, passengers and soldiers, and the castles provided platforms for defence. They were slower to turn and harder to handle in confined waters than caravels. The rounded, tall design also made them vulnerable in rough seas if overloaded, and the long Portuguese India voyage was dangerous. Records of the later sixteenth century show that carracks were lost in significant numbers, for reasons including storms, overloading and poor maintenance. Such losses became part of the story of the Cape route, a long and demanding passage.
The nao
Nao is simply the Spanish word for a ship, and it can mean a carrack-type vessel, a large merchant ship, or a general term. For that reason it is the most slippery of the three. Columbus’s flagship, the Santa Maria, is usually described as a nao: a full-bodied cargo carrier, and larger than the two caravels that accompanied it.
Ferdinand Magellan’s expedition, which left Spain in 1519, sailed with five ships, usually described as naos of various sizes. Only one, the Victoria, completed the voyage back to Spain in 1522 under Juan Sebastian Elcano. Their sizes, condition and fittings were a subject of complaint in contemporary accounts, a reminder that explorers sailed whatever ships could be afforded and obtained rather than ideal designs.
Comparing them as working ships
| Feature | Caravel | Carrack / nau | Nao |
|---|---|---|---|
| Size | Small | Large | Medium to large |
| Strength | Handling, shallow draft | Cargo capacity | General merchant use |
| Usual role | Scouting and coastal exploration | Long-distance trade and transport | Cargo and expedition ships |
| Weakness | Little cargo space | Slow to handle | Varied quality |
The table is a simplification. A real ship might be rebuilt, re-rigged or renamed, and sources of the period use terms inconsistently.
Why a fleet was often mixed
Expeditions often combined ship types. A small caravel could sail ahead, enter shallow waters or report on a coast, while a bigger vessel carried supplies. Provisions were a constant limit: biscuit, salted meat, water and wine had to be loaded for months, and disease took many lives. The problems of shipboard provisions and scurvy at sea shaped how far a voyage could go. Wooden hulls also suffered from shipworm in warm waters, and repairs were a frequent preoccupation.
A broader context
European ships were not the only large ocean-going vessels of the period. In the early fifteenth century the Zheng He voyages sent large Chinese fleets across the Indian Ocean, and Indian Ocean traders sailed their own ships on regular routes shaped by the monsoon trade winds. What distinguished the Iberian voyages was the route they opened across the Atlantic and around Africa, not any claim that their ships were simply superior.
The ships themselves left little behind: few hulls survive, and what is known comes largely from written records, paintings and a small number of wrecks. That is one reason historians continue to argue about exact designs, and why the broad categories above are best treated as a guide rather than a set of fixed definitions.