On 7 April, the destroyer returned to Vietnamese waters. After two days of anti-PT-boat training at Danang, she began duty on the south SAR (Search and Rescue) station. Almost a month later, the destroyer relieved her; and "Theodore E. Chandler" returned to Yokosuka on 11 May. The warship remained in Japan until the end of the month; then steamed south to the Philippines. After two days at Subic Bay, she got underway on 5 June to return to the Gulf of Tonkin. On 7 June, she joined the aircraft carrier on "Yankee Station" and served as the carrier's escort and plane guard for five days.