Importance of periodical examination and maintenance of propellers for ensuring seaworthiness of cargo vessels

A vessel as defined by COLREG, is operating in international waters with the assumption that it complies with international conventions adopted by the Flag Administration where it has been registered. In this regard vessels are periodically evaluated by Classification Societies recognised by the Flag, which confirm the fitness for operation of the vessel hull, installation, machinery and equipment. This is also the case of the vessel`s propeller, a vital component responsible for moving the ship, thereby directly contributing to its sea worthiness. Propeller and Shaft are subject to periodical surveys, where a different type of assessment is carried out in connection with the vessel age, CSSC Certificate cycle and operational parameters. Any malfunction of the propeller is to be identified in due time and to be rectified by approved procedures in order to avoid unwanted casualty in operation.