According to the importance of Sea level in coastal/offshore scientific and nonscientific activities including Seafaring, oceanography, coastal engineering, offshore industry, coastal zone management, Marine geology, marine laws and boundaries and Climate changes, National Cartographic Center(NCC) of Iran began to installtide-gaugesto collect sea level data along the Persian Gulf and Oman sea coastlines since 1990 and Caspian sea since 1998.

NCC has also been responsible for analyzing collected tidal data in order to extract thetidal components, height datum as the basis for national levelling network and chart datum used for preparing marine navigational charts.

tidal/sea-level datais collected and processed topredict the sea level which is used by mariners together with navigational charts to improve the safety of navigation.

Navigational chart is a graphic representation of a sea area and adjacent coastal regions. depending on the scale of the chart, it may show depths of water and heights of land, natural features of the seabed, details of the coastline, navigational hazards, locations of natural and human-made aids to navigation, information on tides and currents, and human-made structures such as harbors, buildings and bridges.

As the depthsdepicted on a chart are normally referred toChart Datum, tidal prediction play a key role in navigation to inform the mariners about the exact/safe depth while sailing.

National Cartographic Center of Iranis proud to have collected, analyzed and predicted the sea level data as the first state-owned professional and scientific organization. Tidal prediction and online sea level data are provided to all users through our website and mobile application program(NCCTIDE).