“Today is the 100th anniversary of World Hydrography day. Since 2005, this has been celebrated every year on 21st June. The vision of celebrating the world's Hydrography day is to promote the importance of hydrography and publish the works of hydrographers. Every year, a new theme is selected by the International Hydrographic Organization (IHO) to commemorate world hydrography day. The theme for the Year 2021 is "One hundred years of international cooperation in hydrography"