World Hydrography Day
June 21, Saturday

History of the celebration
* The day was officially approved by the UN General Assembly in 2005.
* The idea originated within the activities of the International Hydrographic Organization, founded in 1921.
* Since 2006, the day has been celebrated annually in various countries around the world.
Objectives and significance of hydrography
Hydrography is the science that studies marine and inland waters, their depths, seabeds, currents, and other characteristics affecting navigation and coastal activities.
Main objectives:
* ensuring navigational safety
* supporting maritime trade
* assisting in the study of marine resources
* contributing to environmental monitoring and sustainable use of the marine environment
How World Hydrography Day is celebrated
* organizing scientific conferences and forums
* publishing special reports and documents
* educational events in schools and universities
* demonstrations of hydrographic equipment: echo sounders, survey vessels, etc.
* involvement of international organizations and maritime authorities
Theme of each year
Each year, the IHO sets a thematic focus for the celebration. Themes highlight current issues and priorities, such as:
* digitalization of nautical charts
* the role of hydrography in climate change
* sustainable development of the oceans
Interesting facts
* Without hydrography, it is impossible to create navigation charts used by ships worldwide.
* Modern technologies allow high-precision seabed mapping at great depths.
* Large areas of the ocean remain inadequately mapped to this day.
World Hydrography Day in other years
World Hydrography Day in other countries
- Afghanistan
- Albania
- Algeria
- American Samoa
- Andorra
- Angola
- Anguilla
- Antigua and Barbuda
- Argentina
- Armenia
- Aruba
- Australia
- Austria
- Azerbaijan
- Bahamas
- Bahrain
- Bangladesh
- Barbados
- Belarus
- Belgium
- Belize
- Benin
- Bermuda
- Bhutan
- Bolivia
- Bonaire
- Bosnia and Herzegovina
- Botswana
- Brazil
- British Virgin Islands
- Brunei
- Bulgaria
- Burkina Faso
- Burundi
- CAR
- Cambodia
- Cameroon
- Canada
- Cape Verde
- Cayman Islands
- Chad
- Chile
- China
- Colombia
- Comoros
- Congo
- Cook Islands
- Costa Rica
- Croatia
- Cuba
- Curacao
- Cyprus
- Czech Republic
- DR Congo
- Denmark
- Djibouti
- Dominica
- Dominican Republic
- East Timor
- Ecuador
- Egypt
- El Salvador
- Equatorial Guinea
- Eritrea
- Estonia
- Eswatini
- Ethiopia
- Falkland Islands
- Faroe Islands
- Fiji
- Finland
- France
- French Guiana
- French Polynesia
- Gabon
- Gambia
- Georgia
- Germany
- Ghana
- Gibraltar
- Greece
- Greenland
- Grenada
- Guadeloupe
- Guam
- Guatemala
- Guernsey
- Guinea
- Guinea-Bissau
- Guyana
- Haiti
- Honduras
- Hong Kong
- Hungary
- Iceland
- India
- Indonesia
- Iran
- Iraq
- Ireland
- Isle of Man
- Israel
- Italy
- Ivory Coast
- Jamaica
- Japan
- Jersey
- Jordan
- Kazakhstan
- Kenya
- Kiribati
- Kosovo
- Kuwait
- Kyrgyzstan
- Laos
- Latvia
- Lebanon
- Lesotho
- Liberia
- Libya
- Liechtenstein
- Lithuania
- Luxembourg
- Macau
- Madagascar
- Malawi
- Malaysia
- Maldives
- Mali
- Malta
- Marshall Islands
- Martinique
- Mauritania
- Mauritius
- Mayotte
- Mexico
- Micronesia
- Moldova
- Monaco
- Mongolia
- Montenegro
- Montserrat
- Morocco
- Mozambique
- Myanmar
- Namibia
- Nauru
- Nepal
- Netherlands
- New Caledonia
- New Zealand
- Nicaragua
- Niger
- Nigeria
- North Korea
- North Macedonia
- Northern Mariana Islands
- Norway
- Oman
- Pakistan
- Palau
- Palestine
- Panama
- Papua New Guinea
- Paraguay
- Peru
- Philippines
- Poland
- Portugal
- Puerto Rico
- Qatar
- Reunion
- Romania
- Russia
- Rwanda
- Saint Helena
- Saint Kitts and Nevis
- Saint Martin
- Saint Vincent and the Grenadines
- Saint-Barthelemy
- Samoa
- San Marino
- Sao Tome and Principe
- Saudi Arabia
- Senegal
- Serbia
- Seychelles
- Sierra Leone
- Singapore
- Sint Maarten
- Slovakia
- Slovenia
- Solomon Islands
- Somalia
- South Africa
- South Korea
- South Sudan
- Spain
- Sri Lanka
- St. Pierre and Miquelon
- Sudan
- Swaziland
- Sweden
- Switzerland
- Syria
- Taiwan
- Tajikistan
- Tanzania
- Thailand
- Togo
- Tokelau
- Tonga
- Trinidad and Tobago
- Tunisia
- Turkey
- Turkmenistan
- Turks and Caicos Islands
- Tuvalu
- U.S. Virgin Islands
- UAE
- Uganda
- Ukraine
- United Kingdom
- United States
- Uruguay
- Uzbekistan
- Vanuatu
- Vatican
- Venezuela
- Vietnam
- Wallis and Futuna
- Western Sahara
- Yemen
- Zambia
- Zimbabwe