World Hydrographic Day is being celebrated on the 21st June every year to commemorate the establishment of the International Hydrographic Bureau by 19 member states in 1921 at the Principality of Monaco at the invitation of HSH Prince Albert I, a noted marine scientist and oceanographer, who had graciously offered the requisite space and facilities free of cost. In 1970, it was renamed as the International Hydrographic Organisation (IHO) and has presently 80 Member States, covering the vast majority of Ocean States. IHO plays a very useful role in Standardisation, International Charts, Capacity Building and Technical Cooperation, Education and Training, Hydrographic Surveying, Charts (paper and digital), Regional Hydrographic Commissions, Cooperation with other International Organisations, Tsunami Information, and nautical Publications.