Circular Letters 2025
| Reference | Title |
| CL11 | IMO/IHO Workshop on S-100 Implementation |
| CL10 | Questionnaire for the IHO - Nippon Foundation Geospatial Marine Analysis and Cartography (GEOMAC) Project. |
| CL09 | 23rd meeting of the Capacity Building Sub-Committee (CBSC23) 28 - 30 May 2025, IHO Secretariat, Monaco and the 17th meeting of the Inter-Regional Coordination Committee (IRCC17) 03-05 June 2025, IHO Secretariat, Monaco. |
| CL08 | IHO Project Empowering Women in Hydrography. Shom (France) Hydrographic Training - Call for Applications |
| CL07 |
S-100-Based Product Specifications Phase 1 – S-124 Navigational Warnings, S-128 Catalogue of Nautical Products CALL FOR APPROVAL and S-158:101 Edition 1.0.0 Electronic Navigational Chart Validation Checks - Publication Notice |
| CL06 | Master of Science Programme in Hydrographic Science at the University of Southern Mississippi (USA) sponsored by the Republic of Korea, Selection of candidates (13th Course, 10 August 2025 - 5 August 2026) |
| CL05 | UN Ocean Decade Activity Register, UNOC3 Participation, UNOC3 Political Declaration |
| CL04 | Call for Applications for Training under the IHO - Nippon Foundation Geospatial Marine Analysis and Cartography (GEOMAC) Project, UKHO, Taunton, UK |
| CL03 | Adoption of IHO Publications / S-100 Based Product Specifications Phase 1 – S-101, S-102, S-104, S-111, S-129 |
| CL02 | 17th meeting of the Hydrographic Services and Standards Committee (HSSC-17), 5-9 May 2025 Stavanger, Norway |
| CL01 | Theme for World Hydrography Day 2025 and Media Outreach |
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