 She conducted a training mission to Yokosuka, Japan, in February and March 1969 before returning to a schedule of surveillance operations in the northern Mariana Islands.She trained for possible participation in Project Apollo in April 1969 before she towed three barges from Sattahip, Thailand, to Vung Tau, South Vietnam, from 13 April 1969 to 8 May 1969.Upon returning to the vicinity of the Mariana and Caroline Islands soon thereafter, she conducted local operations through the end of 1969.