IHO/IALA WS on S-100/200

2nd Joint IHO/IALA workshop on S-100/200 development and portrayal

Annapolis, Maryland, United States of America

The International Association of Marine Aids to Navigation and Lighthouse Authorities (IALA) and the International Hydrographic Organization (IHO) in association with the US Committee on Marine Transportation System, are hosting the second joint workshop on S-100/200 development and portrayal to be held in Annapolis, Maryland, USA, from 09 to 13 September 2024.

Online Registration

Register here


In January 2010 the International Hydrographic Organization (IHO) published S-100 – Universal Hydrographic Data Model, a framework geospatial standard for hydrographic-related digital data. S-100 is aligned with the ISO 19100 series of geographic standards, thereby making the use of hydrographic and other geographic data more interoperable than using the present IHO S-57 data transfer standard.

IALA is establishing the S-200 domain, in consultation with IHO. This domain uses the range S-201 to S-299 for Product Specifications compliant with the IHO S-100 standard, covering fields within the IALA remit, including Aids to Navigation (AtoN), Vessel Traffic Services (VTS), positioning systems and communication systems.

The Norwegian Coastal Administration hosted the first joint session in September of 2022 and now the second will be hosted by the US.


The workshop will consist of presentations from a range of expert speakers covering topics including an update on S-100 and S-200, various Hydrographic Offices and Aids to Navigation Competent Authorities sharing their experiences, views and opinions.

Following these presentations, working group sessions will be held with a focus on identifying gaps in the S-100 series data, S-201,124 and 125 development and S-98 interoperability and Marine AtoN portrayal from the operational, technical and training perspective.

The objective of the workshop is to continue to harmonize and open feedback channels between IHO and IALA regarding Product Specification requirements, development processes, implementation gaps and a way forward.

The workshop deals with S-100 / S-200 aspects. This will include a range of topics, such as:

  • Shared Experiences (lessons Learned);
  • Implementation plans to meet upcoming deadlines;
  • Identifying gaps;
  • Challenges – focus on operational, technical, training aspects;
  • Review of IHO, IALA Recommendations & Guidelines;
  • Portrayal developments; and
  • Harmonizing IHO & IALA PS Development.

Managers, competent authorities, engineering and technical staff responsible for the delivery, operation and management of AtoN would benefit from attending the workshop.
Manufacturers of AtoN equipment and systems will also be in attendance.

All cancellations must be sent by e-mail to contact@iala-aism.org
A refund in full of the registration fee will only be provided if notification is given at least one week prior to the event. Otherwise, a cancellation charge of 50% will be applied. Name changes will be accepted. In case of a no-show, 100% of the registration fee will be charged.


You can download the workshop’s provisional programme here :