In order to be able to trade, a ship has to be registered with a Classification Society. Classification Society records show how a ship is being maintained according to the required survey cycles and any recurring problems will be evident. Quite frequently, if a ship has a record of changing from one Classification Society to another during its life, this could indicate that the maintenance might be poor. Inspection records of the Classification Society gives the inspector some guidelines for any areas that may need to be especially considered when the physical inspection of the ship takes place. Inspection of the ship’s class records and physical inspection would normally be carried out by the buyers’ inspectors or independent surveyors.