It is a proprietary lien where interest is about the property. It should be understood that “res” may be the vessel (including its appurtenances and equipment), the cargo, the freight or even the proceeds of sale. The rights include "jus in re" (right on the property) and "jus in rem "(right against the property). The doctrine of maritime lien is that a ship will be treated as a wrongdoer, not the owner, that the loss, damage or harm is caused by the maritime property, "itself", and it has to make good for the loss. The attachment of maritime lien will start when the cause of action arises and will not be eliminated even by change of ownership in a good faith purchase.