Hydrography is the science of surveying and charting bodies of water, such as oceans, seas, lakes, and rivers.
World Hydrography Day, 21 June, was adopted by the International Hydrographic Organization as an annual celebration to publicise the work of hydrographers and the importance of hydrography
The date chosen for World Hydrography Day is the anniversary of the founding of the International Hydrographic Organization
The observance of the day emphasizes importance of hydrography particularly in protection of marine reserves and also promotion of safe navigation in international waters and ports.
IHO was established as the International Hydrographic Bureau in 1921.
In 2005 the IHO adopted the concept of a World Hydrography Day, which was "welcomed" by the United Nations General Assembly in Resolution A/RES/60/30 Oceans and the law of the sea
World Hydrography Day was adopted, in the words of the UN, with the aim of: ... giving suitable publicity to its [IHO's] work at all levels and of increasing the coverage of hydrographic information on a global basis ...
Once a theme is agreed, the IHO Member States, international and national hydrographic organisations and services develop activity programs and events that highlight the annual theme.
It is determined by the member states of the International Hydrographic Organization and is intended to promote the importance of hydrography internationally, multilateral cooperation and effective collaboration in data exchange, charting and standards development.
The theme for 2017 is "Mapping our seas, oceans and waterways - more important than ever"
Themes of World Hydrography Day
2017: Mapping our seas, oceans and waterways - more important than ever
2016: Hydrography - the key to well-managed seas and waterways
2015: Our seas and waterways - yet to be fully charted and explored
2014: Hydrography - much more than just nautical charts
2013: Hydrography - underpinning the Blue Economy
2012: International Hydrographic Cooperation - supporting safe navigation
2011: Human Resources - The important element to the success of hydrography
2010: Hydrographic Services - the essential element for maritime trade
2009: Hydrography - Protecting the marine environment
2008: Capacity Building, a vital tool to assist the IHO in achieving its mission and objectives
2007: Electronic Navigational Charts (ENCs); an essential element of safety at sea and efficient maritime operations
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