1·At the same time, security right on ships includes mortgage of ships, maritime liens and possessory liens on ships. Each has its own characteristics too.
同时，船舶担保物权包括船舶抵押权、船舶优先权、船舶留置权三种，它们也各有各的特点。
2·In chapter 7 lien on sub-freight and lien on sub-earning are analyzed, and the conclusion is that both liens are assignment of creditor 's right and not possessory liens.
第7章讨论分租运费留置权和转租收入留置权，结论为二者的性质是债权转让而非占有留置权。
3·Possessory lien on ship is one of the most important contents of security right on ships.
船舶留置权是船舶担保物权中的一项重要内容。
4·For the writer, possessory lien on vessel attains the priority in compensation, in order to fully protects the lienor's right and interest.
笔者认为，为了更充分地保护留置权人的利益，平衡船舶优先权、船舶抵押权和船舶留置权，应当使船舶留置权优先受偿。