Sri Lanka Navy Hydrographic Service (SLNHS) has achieved a historic milestone by producing 27 Electronic Navigational Charts (ENCs) covering major ports, harbour approaches and coastal waters around the country. This achievement has been made within three years of the establishment of SLNHS on 14 Dec 2023 under the Ministry of Defence.
Sri Lanka National Hydrographic Office (SLNHO) serves as the nation’s hydrographic authority, coordinating hydrographic activities, national chart production, international cooperation and maritime geospatial information management.
World Hydrography Day is celebrated annually on 21 June under the patronage of the International Hydrographic Organization (IHO) to raise awareness of the vital role hydrography plays in ensuring safe navigation, supporting maritime trade, protecting the marine environment and advancing the sustainable use of the world’s oceans.
Sri Lanka is set to celebrate World Hydrography Day 2026 on 23rd June at the Wave n’ Lake Navy Hall, Welisara. The national event will be held under this year’s theme announced by the IHO: “Transforming how ocean data is shared.”
The Chief Guest at the celebration will be the Secretary to the Ministry of Defence, Air Vice Marshal Sampath Thuyacontha (Retd). The keynote address will be delivered by Senior Professor Nalin Ratnayake, Vice Chancellor of the Ocean University of Sri Lanka.
As part of the World Hydrography Day Programme, the SLNHO will also conduct a special two-day theoretical and practical training programme for university students on 23 and 24 June 2026.
The initiative is also designed to expose students engaged with the subject on hydrographic surveying techniques, sonar systems, positioning technology, chart production, data processing and field survey operations. Participants will receive hands-on exposure to modern hydrographic equipment and technologies currently employed in professional survey operations.The programme aims to build national awareness of hydrography and inspire the next generation of hydrographers, marine scientists and geospatial professionals who will contribute to Sri Lanka’s future maritime development.
This year’s celebration takes place at a historic moment for Sri Lanka’s maritime sector following the enactment of the National Hydrographic Act in 2024, a milestone that established a comprehensive legal framework for hydrographic governance in the country.
The Act provides a comprehensive legal framework for hydrographic governance, strengthens national coordination, supports maritime safety and security and enables Sri Lanka to fulfil its international obligations as a responsible maritime nation.
The governance of SLNHO is overseen by the National Hydrographic Council (NHC), an 18-member body representing key ministries, government agencies and maritime stakeholders.
Although Sri Lanka possesses a proud maritime heritage dating back centuries, national chart production of the country remained mostly untouched in the post-colonial period thus incurring considerable financial loss to the country.
Since its establishment, the SLNHO has spearheaded an unprecedented expansion of Sri Lanka’s hydrographic and nautical charting capabilities. Collectively, SLNHO efforts have added 115,396.81 square kilometers of new ENC coverage.
Sri Lanka’s maritime area under national jurisdiction extends over 538,162.02 square kilometres. Through the dedicated efforts of the SLNHO, ENC coverage has now expanded to 115,733.35 square kilometers, representing 21.5% of the nation’s maritime waters.
The production of 17 new ENC cells in 2026 alone represents a landmark achievement for Sri Lanka’s hydrographic programme and demonstrates the country’s growing capacity to produce internationally compliant nautical chart products independently.
This remarkable progress reflects the effectiveness of the National Hydrographic Act, the strategic guidance of the National Hydrographic Council, and the professional expertise of Sri Lanka’s hydrographers, cartographers and survey technicians.
The rapid expansion of ENC coverage strengthens navigational safety, supports maritime trade and port development, enhances national security concerns, contributes to the Blue Economy and reinforces Sri Lanka’s position as a responsible maritime nation in the Indian Ocean region.
These internationally compliant digital charts are used by mariners worldwide and play a critical role in ensuring the safety and efficiency of maritime navigation. Their production incorporates state-of-the-art technology, including multibeam echo sounding systems, advanced geospatial processing software, satellite positioning systems and modern cartographic software that comply with international hydrographic standards.
The ENC productions have also delivered significant economic benefits. Through international distribution to global chart service providers and maritime users, Sri Lankan chart products generate valuable foreign revenue.
Since its inception, the SLNHO has generated a total revenue of USD 278,645.82 through the production and distribution of ENCs.
In 2025, SLNHO generated a total of USD 88,232.41 in revenue from ENCs. Owing to the increasing number of ENC productions, SLNHO earned USD 73,397.50 during the first quarter of 2026. Based on the current trend and the anticipated increase in ENC production, it is projected that the revenue generated through ENCs will exceed USD 300,000 by the end of 2026.
This projected growth reflects the expanding ENC production capability of SLNHO and its growing contribution to sustainable revenue generation, highlighting the Office’s increasing role in supporting the development of the national hydrographic sector
Additional income is also earned through hydrographic consultancy and survey services supporting national development projects, including port expansion, coastal infrastructure development, dredging operations and marine construction projects.
All revenue generated by the SLNHO is credited directly to the Government Consolidated Fund, ensuring that the benefits of hydrographic services directly contribute to the national economy.
The success of the SLNHO is underpinned by a highly qualified workforce comprising IHO recognized Category ‘A’, Category ‘B’ hydrographers, marine cartographers and qualified survey technicians capable of conducting hydrographic surveys and chart production in accordance with IHO standards.
Sri Lanka is also an active member of the International Hydrographic Organization (IHO) and the North Indian Ocean Hydrographic Commission (NIOHC), enabling the country to contribute to regional hydrographic initiatives while benefiting from international cooperation and knowledge exchange.
A significant milestone in this journey was the finalizing of an arrangement with the United Kingdom Hydrographic Office (UKHO), the most reputed international nautical chart seller of the world, facilitating the global distribution of Sri Lankan nautical chart products and enhancing the country’s profile within the international maritime community.
These partnerships continue to strengthen Sri Lanka’s ability to adopt best practices, access emerging technologies and maintain internationally recognized standards in hydrographic surveying and nautical chart production.
The establishment of the SLNHO has significantly enhanced Sri Lanka’s self-reliance in hydrographic matters.
Historically, the country often depended on assistance from friendly foreign nations to conduct specialized hydrographic surveys following natural disasters such as X-press pearl incident and Tsunami occurred in 2004, maritime emergencies and major infrastructure projects. Today, supported by survey vessels indigenously made by Sri Lanka Navy, advanced hydrographic equipment, trained personnel and institutional expertise, Sri Lanka possesses the capability to undertake and manage such operations independently.
This transformation represents a major advancement in national preparedness and maritime resilience, enabling faster responses to navigational hazards, coastal disasters, environmental emergencies and maritime incidents while reducing dependence on external assistance.
As shipping, offshore energy exploration, fisheries, marine tourism, blue economy initiatives and coastal development continue to expand across the Indian Ocean region, the demand for accurate hydrographic information will become increasingly critical.
By strengthening charting capability, improving ocean-data management, embracing technological innovation and investing in human capital, Sri Lanka is positioning itself to meet these future challenges and opportunities with confidence.
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