船舶“非在航”结束、“在航”开始的时刻就是“开航当时”的时间
선박“비재항”결속、“재항”개시적시각취시“개항당시”적시간
Time between the termination of being ‘not underway’and starting to be ‘underway’ is the ‘time of departure’
저자의 최근 논문