Overview
IEC 63173-1:2021 defines an S-100‑compliant product specification (IHO ID S‑421) for exchanging maritime route plan information. The standard specifies the content, structure and metadata required to create fully S‑100‑compliant route plan datasets and how those datasets are portrayed in S‑100‑based applications. It is focused on the data format for route plan exchange (including limited vessel static details) and does not specify vessel monitoring or logging formats (these can be provided via AIS or other standards/mechanisms). The IHO manages the S‑100 product specification numbers and has assigned S‑421 to this route plan specification.
Key technical topics and requirements
- S‑100 product specification: Defines an S‑100 aligned application schema and feature catalogue for route plans (S‑421).
- Data content & structure: Application schema, geometry, coordinate reference systems and dataset identification rules.
- Feature and information types: Route, RouteWaypoints, RouteActionPoints, RouteSchedules, RouteInfo and associated attributes and bindings.
- Portrayal & metadata: Portrayal catalogue definitions, portrayal rules and required metadata for S‑100 exchange sets.
- Delivery formats: Support for single XML files, compressed containers and S‑100‑compliant exchange sets; provisions for digital signatures, encryption and exchange catalogues.
- Maintenance & lifecycle: Feature/portrayal catalogue management, data source and production process guidance.
- Testing & conformance: Test methods, expected results and test datasets (minimum to full generic test data).
- Annexed use cases: Normative examples such as route cross‑checks, flow management, enhanced monitoring, ice navigation, under‑keel clearance, fleet route planning, route optimization and port call synchronization.
Practical applications and users
Who uses IEC 63173-1 / S‑421:
- ECDIS and navigation system vendors implementing S‑100 data interfaces
- Shipboard and shore-based voyage planning and fleet management software developers
- Hydrographic offices and chart producers creating route plan datasets
- Port authorities, pilotage services and VTS providers exchanging route plans
- System integrators and maritime authorities implementing interoperable route exchange
Typical uses:
- Exchanging planned voyage routes between ship and shore
- Synchronizing port calls and fleet schedules
- Enabling route optimization, under‑keel clearance checks and ice navigation planning
- Integrating route portrayal into S‑100‑based displays and decision‑support tools
Related standards
- IHO S‑100 framework (basis for S‑421)
- IHO S‑421 (S‑100 product specification identifier)
- AIS and vessel monitoring standards (for complementary static/dynamic vessel data)
Keywords: IEC 63173-1, S-421, S-100, maritime route plan, data interfaces, route exchange, ECDIS, portrayal, feature catalogue, route planning.