Each year. on the 21st June,  the International Hydrographic Organization (IHO) celebrates World Hydrography Day. World Hydrography Day is the opportunity to public awareness of the vital role that hydrography plays in everyone's life.

The theme for this year's World Hydrography Day, which coincides with the 98th anniversary of the establishment of the IHO, is:

Hydrographic Information Driving Marine Knowledge

Read the whole IHO bulletin for the 2019 World Hydrography Day

View below the HNHS poster for the day