JAMES M. YAWNJames M. Yawn, gunner’s matefirst class, USN, son of Mr. and Mrs. John Allison Yawn of Grace-ville, Fla., and husband of Mrs. Margaret Yawn of 111-22 38th ave.. Corona, N. Y., is serving aboard the battleship USS Missouri, on her second tour of duty with United Nations forces in Korean waters.The Missouri has been bombard-1 ing Communist supply and com- j munication installations oh the east coast of Korea. She has , steamed over 40,000 miles since leaving her home port of Norfolk, Va., in September.