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IHO Crowdsourced Bathymetry Initiative
The International Hydrographic Organization (IHO) has a long history of encouraging the collection of crowdsourced depth data to help improve humanity’s understanding of the shape and depth of the seafloor. For over a century, maps of the ocean floor were created from depth measurements collected by vessels as they journeyed across the oceans. These “passage soundings” enabled the creation of progressively more detailed seafloor maps and digital data grids. Recently, systematic surveys with specialized ships have contributed to greatly increasing available data. Unfortunately, despite the multitude of data that has been collected, to this day only 25% of the world’s ocean depths have been measured; the rest of the data used to compile seafloor maps are estimated depths.
What is progress with crowd-sourced depth data around the world?
The Crowdsourced Bathymetry Working Group met last week to discuss progress on an IHO-led citizen science initiative to collect seafloor depth data. Discussions focused on updating guidance and learning about progress from some of the first trial projects around the world.
Women who belong in the official history of the Sea
The BGR provides high resolution data for the Pacific and Indian Oceans
The German Federal Institute for Geosciences and Natural Resources (BGR) is participating in the IHO-led efforts to increase knowledge of the ocean and has shared high resolution depth data for the German contract areas for deep-sea exploration granted by the International Seabed Authority (ISA) in the Pacific and Indian Oceans. The BGR provided gridded data for 85.000 km² at a resolution of 120 x 120 meters.
Meso American & Caribbean Sea HC
39th Meeting of the North Sea Hydrographic Commission (NSHC39) Aberdeen, Scotland, UK 17 & 18 March 2026
Seminar on “Raising Hydrographic Awareness” & 26th Meeting of Meso-American and Caribbean Sea Hydrographic Commission (MACHC26) - Niteroi, Brazil – 8-12 December 2025
E-Navigation and GMDSS
Introduction E-navigation is defined as “the harmonized collection, integration, exchange, presentation and analysis of marine information on board and ashore by electronic means to enhance berth to berth navigation and related services for safety and security at sea and protection of the marine environment.” It is intended to meet present and future user needs through harmonization of marine navigation systems and supporting shore services.
