After the new Republic of Korea government was established on August 15 , 1948 , the Korean Coast Guard was formally renamed the Republic of Korea Navy .
Sohn became the first Chief of Naval Operations of the Republic of Korea Navy   on September 5 , 1948 .
After the new Republic of Korea government was established on August 15 , 1948 , the Korean Coast Guard was formally renamed the Republic of Korea Navy , and Sohn became the first Chief of Naval Operations of the ROK Navy on September 5 , 1948 .