Charges paid by a for staying at at a port beyond agreed sailing time is called?

The charges paid by a ship owner or operator for staying at a port beyond the agreed sailing time is called "demurrage". In simpler terms, it means that if a ship stays in a port longer than the time agreed upon, the owner/operator will have to pay extra charges to the port authorities. These charges are meant to compensate for the delay caused to other ships waiting to dock, and for any additional costs incurred by the port due to the prolonged stay of the ship. Therefore, demurrage is a penalty fee for failing to meet the agreed terms of the contract between the ship owner/operator and the port authorities.