Charts of the Rutters of India Facsimile Edition

The Charts of the Rutters of India preserves a rare visual companion to the nautical writings of João de Castro, one of the most important figures of sixteenth-century Portuguese navigation. The manuscript brings together watercolor charts associated with Castro’s Roteiro de Goa a Diu and Roteiro do Mar Roxo. These images were designed to work with the written rutters, turning observation into usable maritime knowledge: coastal profiles, bays, river mouths, ports, fortresses, islands, anchorages, ships, and directional markers guide the reader through the sea routes of the Indian Ocean and the Red Sea.

The manuscript includes 29 watercolor charts, although the known corpus originally comprised more.

Coasts Seen from the Sea

The charts linked to the Goa–Diu route depict key places along the western coast of India, including Goa, Carapatam, Ceitapor, Dabul, Chaul, Beiçoim, Diu, and the waters around Danda and Cifardam. They show the coast as a navigator would approach it: not as a detached map, but as a sequence of recognizable landforms, harbors, estuaries, settlements, and defensive structures.

The Red Sea Passage

The second group follows the Goa–Suez route, extending the visual record toward Socotra, the Strait of Bab el-Mandeb, Massawa, Suakin, Farte, Toro, and Suez. Here the charts register islands, ports, reefs, enclosed bays, and strategic maritime passages, giving visual form to one of the most politically charged sea corridors of the Portuguese expansion.

Ships, Soundings, and Control

Several drawings include Portuguese vessels, from larger ocean-going ships to smaller craft, sometimes placed near harbors or coastal defenses. Their presence makes the charts more than geographic records: they become scenes of reconnaissance, approach, and command.

A Manuscript of Maritime Intelligence

Once owned by Gaspar Barreiros, the manuscript testifies to the circulation of Castro’s nautical knowledge among learned Portuguese circles. It remains a compact visual archive of navigation, empire, and coastal observation, where the sea is read through lines, colors, ships, and shores.