Maintaining your yacht in good condition and making it function efficiently is a tedious process. The major event in the maintenance process is hull cleaning. Hull cleaning is a process of removing the unwanted mud from the bottom of the vessel using various types of equipment. Is there any drawbacks due to the mud content present in the bottom of the vessel?-Eventually, yes, it will make the efficiency of the vessel lower by slowing down the vessel with higher friction. These things will affect the speed of the vessel and difficult to move.
Source: Underwater maintenance Stuart