This research is performed in order to identify and review the effective factors contributing to the improvement of SAR (Search and Rescue) vessel performance in Khorramshahr port. By considering the limitations of search and rescue operations at sea in comparison to those on land, it is necessary for search and rescue operations to be carried out quickly to minimize human loss. It should be noted that the SAR vessel is one of the requirements of this operation. The research method is descriptive-correlational. The statistical population of the research is 70 managers, pilots and responsible persons for search and rescue operations and vessels, VTS officers, and survivors of marine accidents at Khorramshahr port. The sample size was determined based on the table by Morgan, and a statistical sample of 59 people was selected through simple random sampling. Pearson's correlation coefficient and regression analysis were used to analyze the research data, and the SPSS software and structural equation method were used for statistical analysis. The effective factors affecting SAR vessel performance were identified through interviews with experts and by reading the latest articles and sources. The Result of the Skewness and Kurtosis tests show the data distribution is normal; therefore, parametric tests such as Pearson correlation can be used. Findings of research show that it is necessary to buy SAR vessels with high speed and more carrying capacity, night vision equipment such as fog lights, appropriate communication tools, complete and essential medical equipment, advanced navigation equipment, salvage equipment, competent operators and familiarity with Arvand waterways conditions that are affecting on SAR vessel performance in Khorramshahr port.