The content of this thesis mainly includes these as follows : elaborate the origin , the related concept and the code of the ship registry . make a study on the ship registry of the main big shipping countries , their advantages and disadvantages , and their development . analyze and study the influence on our country ' s shipping circles put by our country ' s present ship registry system and convenient flags 本论文主要包括以下几方面的内容：第一，对船舶登记的由来以及对与船舶登记相关的概念和法理进行了阐述；第二，对当今世界主要航运大国的船舶登记制度及其利弊和发展对策进行了研究；第三，对我国现行船舶登记制度及其利弊和方便旗对我国航运业的影响进行了研究分析。
Because our country has always implemented the close ship registry , the ships flagged our country have reduced and become aged , technical condition is low , hidden peril in maritime safety is serious , transferred flag is common , and drain on tax is big . with a result of these , development in our country ' s economy has been influenced in a negative way 由于我国一直以来实施封闭型船舶登记制度，造成我国国旗船队不断萎缩，船舶老化，技术状况低下，安全隐患严重，船舶移籍普遍，税费流失大，对我国经济发展造成了一定的负面影响。
This thesis first contrasts different theories on legal effect of registration in civil law , then ascertains the scope of the third party , finally demonstrates the problems of ship registration and choice of effect pattern . hope it to be helpful for the amendment and improvement of current stipulations 因此，笔者在以下的行文中先从传统民法中的登记效力着手，通过对登记对抗主义和登记生效主义法律制度及理论的比较研究，结合第三人范围的界定问题，探讨船舶登记法律制度存在的问题和效力模式的选择，以期对现行法律的修改与完善略抒管见。
