This Registry is owned by the International Hydrographic Organization (IHO) and is managed by the Secretariat of the IHO. The site contains several Registers of hydrographic related information administered by specialist domain experts. Each Register type may be further sub-divided into Domains, for example Hydrographic, Nautical Publications, Ice, Weather, and Inland ENC. The administration of this Registry conforms to IHO Publication S-99 (Operational Procedures for the Organization and Management of the IHO Geospatial Information Registry), a copy of which can be downloaded here.

The information contained in the Registry can be freely accessed, however items can only be added or changed by the representatives of approved Submitting Organizations. Application to become a Submitting Organization representative can be made by fulfilling the requirements of the prerequisite form available here. Once accepted as a Submitting Organization representative you are free to submit proposals to any Register. An application form for requesting a new Domain to be added for the Data Dictionary or Portrayal Register is available here. The Registry interface undergoes periodic improvements and any difficulties using this site should be reported to the Registry Manager.

Please note: It is not necessary to be a Submitting Organization in order to request new (S-62) Data Producer codes. Requests for new Data Producer codes or changes to existing codes should be sent to the following email addresses (info@iho.int and tsso@iho.int).