The fleet tug arrived in Pearl Harbor on 28 May and began post-deployment stand down and a restricted availability. She commenced local operations on 1 July and that assignment continued into 1970. Late in January of that year, "Abnaki" headed for the western Pacific and arrived in Subic Bay toward the end of the second week in February. Although most of that deployment was devoted to operations out of Subic Bay followed by visits to Sasebo and Hong Kong, the fleet tug made a voyage into the Vietnam combat zone when she visited Da Nang late in May. In mid-June, she headed back to Pearl Harbor where she arrived at the end of the month for operations out of that port into the spring of the following year.