In a pivotal move for maritime charting and geospatial intelligence, Esri has announced new capabilities in its flagship solution, ArcGIS Maritime, allowing hydrographic organisations to produce chart products compliant with the S‑100 series while maintaining legacy support for the widely used S‑57 standard. This dual-format capability addresses what many consider a major bottleneck in the transition to modern marine spatial data infrastructures.
Background on Charting Standards
The S-57 standard, first adopted in the early 1990s by the International Hydrographic Organization (IHO), defines the digital exchange format for electronic navigational charts (ENCs) used by shipborne systems such as ECDIS. While S-57 has served global navigation for decades, its limitations in flexibility, data extensibility and multi-domain interoperability have prompted the IHO to develop the S-100 framework: a modern, geospatially aligned standard designed to accommodate a wider set of marine data products (e.g., bathymetry, tides, currents, environmental zones) beyond navigation alone.
According to industry commentary, S-101 (the product specification for ENCs under S-100) “will not re-engineer the characteristics currently found in S-57 ENCs” but will align with ISO 19100 geospatial standards and “allow for a much more dynamic and interoperable display of data.”
What Esri’s Update Offers
Esri’s announcement describes how ArcGIS Maritime now allows organisations to generate S-101-compliant ENCs while simultaneously supporting the ongoing production of S-57 charts. The software tools include functionality such as converting S-57 datasets into S-101 format, importing and managing S-100 feature catalogues, and automating export workflows.
This capability helps hydrographic offices, port authorities and maritime agencies avoid maintaining entirely separate workflows for legacy and future-proof standards. By integrating both standards within one GIS-centric system, organisations can maximise efficiency and better align with future marine spatial data infrastructure (MSDI) goals.
Why It Matters for Maritime and Hydrographic Intelligence
The benefits of this transition are considerable. By aligning chart production with modern geospatial systems, agencies can move from static, navigation-only charts to richer, dynamic data products that support safety, environmental stewardship, and the blue economy. For example, combining navigation charts with bathymetry, tides, vessel traffic and environmental zones within a GIS enables enhanced situational awareness, hazard response, route optimisation and multi-agency cooperation.
Moreover, the adoption of S-100 underpins digital integration across the maritime domain—bridging terrestrial, atmospheric and marine datasets to create holistic geospatial intelligence. Agencies that adopt such capabilities early gain a strategic advantage in maritime planning, offshore development, environmental monitoring and maritime security.
Problems This Technology Solves
The “dual-production” paradox of generating both S-57 and S-101 ENCs has challenged hydrographic offices globally. According to National Oceanic and Atmospheric Administration (NOAA)’s transition plan, the S-101 specification is set to replace S-57 over roughly a decade, but until then both must be supported concurrently. Esri’s solution reduces duplication of effort, simplifies database structures and streamlines conversion workflows.
Furthermore, legacy S-57 workflows tend to be manual, inflexible and siloed. With automation in ArcGIS Maritime, agencies can validate, convert and publish more efficiently—reducing human error, accelerating turnaround and improving data quality. And in the context of marine intelligence, the ability to integrate chart data with other geospatial layers unlocks new uses—from environmental risk assessment to offshore infrastructure planning.
Advantages and Disadvantages
Advantages:
- Unified platform: One toolchain handles both S-57 and S-101 workflows, reducing infrastructure overhead.
- Automation: Conversion tools and geoprocessing workflows accelerate chart production and reduce manual tasks.
- Richer data integration: With S-100 alignment, organisations can combine navigational charts with bathymetry, currents, tides and other geospatial datasets for broader intelligence.
- Future readiness: Early adoption of S-101 and S-100 positions agencies for the upcoming wave of marine spatial analytics and navigation systems.
Disadvantages/Challenges:
- Transition complexity: Until all vessels and systems adopt S-100 standards, the “dual fuel” period persists—with increased operational overhead.
- Legacy system compatibility: Many vessels and ECDIS systems still rely solely on S-57; full utilisation of S-100 benefits depends on uptake across the fleet.
- Data conversion issues: Converting from S-57 to S-101 isn’t always straightforward; guidance and converters exist, but human intervention and data clean-up remain necessary.
- Cost and competency: Organisations may need to invest in GIS infrastructure, training and workflow redesign to fully leverage the new capabilities.
With the S-100 era underway and operational S-101 ENCs expected from 2026 (with dual-fuel production continuing into the next decade), hydrographic offices must prepare now. Leveraging tools like ArcGIS Maritime enables them not only to manage the transition but to evolve towards a marine spatial data-driven future.
The update from Esri signals that hydrography is no longer just about charting — it’s about geospatial intelligence, integration and smarter marine decision-making. Organisations that act now stand to gain both navigational safety and strategic advantage.
As Editor in Chief of The Maritime, I lead content development, interviews, and digital storytelling across our multimedia maritime platform. With over 10 years of experience in the maritime industry, I create and publish in-depth stories and video features that highlight key players, emerging trends, and operational realities across global shipping. Before launching The Maritime, I worked as a Vessel Operator at Imza Marine A.S., gaining hands-on commercial shipping and voyage operations experience. I also served as Marketing Communications Specialist at Gimas Ship Supply & Services, where I managed corporate communication, digital strategy, and industry outreach for shipowners and maritime clients. I hold a Master’s degree in Maritime Transportation Management from Istanbul Technical University and a Master’s degree in Publishing from Marmara University. My work is driven by the belief that the maritime world deserves strong, informed, and accessible media representation. I am committed to sharing the stories of maritime professionals and contributing to the sector’s visibility, knowledge exchange, and future development.
