The trade with its contribution to Turkish maritime industry, named as coaster transportation, operated by near coastal voyages by means of low-tonnaged ships (1000-12000 DWT), has been both the backbone of Turkish maritime industry and the first step in owning bigger sized ships which is an upper level in the industry. Third party ship management is a service which has been used more often recently by all types and scales of companies to take competitive advantage in steadily changing and improving maritime industry. This study has been held by correlational research method which is a survey research model, for the purpose of identifying if there is a statistically significant difference between the ships fully managed by third party ship management companies and fully in-house managed ships by using BIMCO's Key Performance Indicator Standards V3.0. One way Anova (one way variation test) is used in analysing and evaluating the SPI values to to find out if there is a statistically significant difference among companies. At the end of the study, it is found that there is a statistically significant difference between the performances of two different ways managed ships..