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STENNIS SPACE CENTER, Miss.—— World "Hydro" Day 2022 marks the 101st anniversary establishing the International Hydrographic Organization, which sets the standard for hydrographic surveying and publication of safety of navigation products, June 21. World Hydro Day celebrations are designed to raise awareness about hydrography and how it plays a role in improved knowledge of the seas and oceans. The day provides opportunities to publicize work and services carried out by national hydrographic offices and stimulate technical collaboration on a global scale. Since 1830, the U.S. Navy has been conducting hydrographic surveys on the high seas, starting with Lt. Matthew Maury’s expedition.