Charta Software developed a probabilistic tidal window determination application (PROTIDE). The application advises port authorities and pilots on keel clearance safety for channel and tidal-bound ships to enter the harbor. It combines a static keel clearance calculation (based on water level, draft and channel depth) with ship dynamic components (squat, maneuvering, wave response) to analyse the risk of channel bottom touches. With PROTIDE a port can maximize port accessibility while maintaining the desired safety level.


PROTIDE is used by a variety of ports in both Europe and the United States. Among the ports using PROTIDE in their operational processes are the Port of Rotterdam, the Port of Antwerp and the Port of Long Beach. Go to for a sneak peak of PROTIDE.

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