World Hydrography Day.

Byline: Minahil Sajid

Earth is covered with a proportion of 70 per cent of water and 30 per cent of land which signifies that water is an essential constituent for all living things. This proportion of water on Earth can be seen in the form of oceans, seas, rivers, lakes etc. Humans, being curious in nature have always strived for exploring this universe which has led them to discover the secrets of space, other planets and the world deep into the sea. Scientists and experts still believe that there is a little known about the seas and yet there is a lot more to explore.

Hydrography deals with collecting depth of sea and leading towards mapping of rivers, lakes and oceans. It also gives information about seafloor in the form of typical nautical charts or maps that show depth and other features and information such as rocks, underwater obstructions, wrecks etc to support safe navigation. The modern hydrography has become capable of providing milli metric accuracy in depth and position measurements.

World Hydrography Day (WHD) is celebrated on 21 June with a different theme every year to acknowledge and recognize the hydrographic efforts. This year, theme of the Day is ' Hydrographic information driving marine knowledge' which aims at information and awareness among people about marine life. As per the United Nations Conventions on Law of the Sea (UNCLOS), every coastal state is responsible for carrying out hydrographic surveys and the production of charts and maps of its waters to provide accurate nautical information to ensure safe passage.

Pakistan Navy is a four dimensional force and is playing its role not only in defense of the country but also in various other fields. Concerted efforts of various departments of Pakistan Navy which are contributing in the field of Hydrography are worth mentioning. Pakistan Navy Hydrographic Department (PNHD) is playing its prime role in fulfilling the international obligation of undertaking Hydrographic Surveys and production of Hydrographic charts in a befitting manner. It also represents Pakistan on all national and international hydrographic forums. Apart from publishing traditional charts, PNHD Charting Center is also producing state of the art electronic charts as per international standards. These electronic charts play central role in today's automated electronic navigation concept. Pakistan Navy Hydrography School trains officers and men of not only Pakistan but also other Allied countries like...