Santa Catarina do Monte Sinai was a higher-castled Portuguese carrack with 140 guns, launched down in 1520 (800 t, length 38 m, width 13 m, draft 4–4.5 m). Built in Kochi, India around 1512 it had two square rig masts and is depicted on a painting attributed to Joachim Patinir.
In 1524, it was the flagship of Vasco da Gama, on his third voyage to India.
A carrack (Portuguese: nau; Spanish: nao; Catalan: carraca) is a three- or four-masted ocean-going sailing ship that was developed in the 14th to 15th centuries in Europe, most notably in Portugal and Spain. Evolving from the single-masted cog, the carrack was first used for European trade from the Mediterranean to the Baltic and quickly found use with the newly found wealth of the trade between Europe and Africa and then the trans-Atlantic trade with the Americas. In their most advanced forms, they were used by the Portuguese and Spaniards for trade between Europe, Africa and Asia starting in the late 15th century, before being gradually superseded in the late 16th and early 17th centuries by the galleon.
In its most developed form, the carrack was a carvel-built ocean-going ship: large enough to be stable in heavy seas, and capacious enough to carry a large cargo and the provisions needed for very long voyages. The later carracks were square-rigged on the foremast and mainmast and lateen-rigged on the mizzenmast. They had a high rounded stern with aftcastle, forecastle and bowsprit at the stem. As the predecessor of the galleon, the carrack was one of the most influential ship designs in history; while ships became more specialized in the following centuries, the basic design remained unchanged throughout this period.
The Portuguese Indian Armadas (Portuguese: Armadas da Índia; meaning "Armadas of India") were the fleets of ships funded by the Crown of Portugal, and dispatched on an annual basis from Portugal to India. The principal destination was Goa, and previously Cochin. These armadas undertook the Carreira da Índia ('India Run') from Portugal, following the maritime discovery of the Cape route, to the Indian subcontinent by Vasco da Gama in 1497–99.
The annual Portuguese India armada was the main carrier of the spice trade between Europe and Asia during the 16th Century. The Portuguese monopoly on the Cape route was maintained for a century, until it was breached by Dutch and English competition in the early 1600s. The Portuguese India armadas declined in importance thereafter. During the Dutch occupation of Cochin and the Dutch siege of Goa, the harbour of Bom Bahia, now known as Mumbai (Bombay), off the coast of the northern Konkan region, served as the standard diversion for the armadas.