The purpose of this training is to establish maritime territorial sovereignty through understanding of ocean and marine names, and to understand marine resources and importance, understanding of marine resources and marine environment, and acquisition of marine information for teacher professional development. This course covers topics such as utilization, maritime safety, the meaning of marine names, and the establishment of maritime territorial sovereignty. Participation Teachers applied for this training based on their interest and curiosity about the ocean in a situation where mandatory training was required. For the contents of marine education at the school site, the maritime safety of social studies and science and comparative education The center was attracting attention as a content of experiences and safety education. Teachers who participated in the training were generally satisfied with the training program and responded that their awareness of maritime education and maritime nomination was improved. However, they preferred to experiment, practice, and experience-based training rather than lecture-type training. Rather, it was hoped that the content that could be used for the field education (class) would be covered. In the future, follow-up support and monitoring should be continued through the provision of customized training and post-training education materials, textbooks, and digital contents using the curriculum and network.