This study aimed to analyze the effect of seafarers’ skills training programs on the performance of seafarers aboard merchant ships and to identify the factors contributing most significantly to training effectiveness. A quantitative method with a causal approach was employed, involving 72 seafarers working on merchant ships. Data were collected through Likert-scale questionnaires and analyzed using validity and reliability tests, classical assumption tests, simple linear regression, the coefficient of determination, and hypothesis testing with IBM SPSS. The results showed that seafarers’ skills training has a positive and significant effect on seafarers’ performance, as demonstrated by a calculated t-value of 11.373 and a significance value of 0.000 (< 0.05), confirming the acceptance of the research hypothesis. The correlation coefficient (R) of 0.806 indicates a very strong relationship, while the coefficient of determination (R Square) of 0.649 demonstrates that 64.9% of the variation in seafarers’ performance is explained by skills training, with the remaining 35.1% attributed to other factors. The findings indicate that training effectiveness is influenced by the training model, methods, instructor competence, relevance of training materials, and availability of facilities and infrastructure. Therefore, seafarers’ skills training is essential for improving competence and performance. Maritime education and training institutions, shipping companies, and government authorities should continuously improve training quality through competency-based curricula, instructor development, and modern simulation technology aligned with international maritime safety standards.
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