On July 3, 2026, researchers from the University of Exeter announced a breakthrough in understanding a historic sailing chart from the 18th century that navigated seafarers through the Red Sea and Gulf of Aden. The chart, part of the Royal Geographical Society’s collection for 189 years, showcases indigenous navigation techniques used for trade and exchange among India, Arabia, and the Horn of Africa.
Unlocking Indigenous Navigation Secrets
The recently analyzed document provides insights into the effective navigation systems utilized by seafaring communities in the region. This Indian Kachchhi/Gujarati chart, one of the most detailed indigenous navigational maps in the Indian Ocean tradition, reflects the extensive local knowledge required for successful maritime navigation in these waters.
Researchers have identified and interpreted place-names and astronomical data inscribed on the chart, revealing vital information such as latitude and sailing directions. This chart was not merely a tool for long-distance travel but a comprehensive reference that offered intimate local insights.
Historical Significance of the Chart
Dating back to the late 18th or early 19th centuries, the chart was acquired by Alexander Burnes in 1835 from an unnamed sea captain in Kachch. Despite its historical importance, previous scholars failed to recognize its navigational capabilities. Burnes noted it would “form a specimen of naval surveying … unequaled in any of the cabinets of Europe” but did not realize its practical applications.
Over the years, the chart has been revisited in 1947, 1987, 2002, 2012, and 2022, yet many of its features, including about 66 Devanagari place names, remained unidentified or misinterpreted. This new study has corrected those oversights, establishing coordinates for all toponyms and improving transcriptions of the Devanagari script.
Insights from the Latest Research
Professor John Cooper, who led the research, emphasized the significance of the chart’s 29 rhumb lines. These lines serve multiple purposes, including establishing coastal trends, indicating travel directions, and possibly providing safe passage into ports. He stated, “Today we are used to maps and charts that project space mathematically and to scale... Although this chart doesn't look accurate to our way of thinking, it allowed seafarers... to negotiate some of the harshest and most challenging waters in the world.”
Dr. Katherine Parker from the Royal Geographical Society highlighted the ongoing process of re-examining their collections, emphasizing the chart’s role as a rich navigational reference. The scroll format allowed sailors to access relevant sections easily while at sea, making it a practical tool for those familiar with local maritime traditions.
- Chart acquired by Alexander Burnes in 1835
- Over 180 islands and reefs depicted
- 66 Devanagari place names identified
- 29 rhumb lines serving multiple navigational purposes
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