sentences:  From Da Nang to the DMZ, she shelled Vietcong and North Vietnamese Army concentrations, and provided night harassment and interdiction fire at known enemy positions.Detached on the 20th, she participated in another SEATO exercise, visited Hong Kong, and on 6 February took up escort and plane-guard duty in the Tonkin Gulf.In March she resumed gunfire support duty north of Nha Trang.