Qui Nhơn
"Whetstone" returned to the waters of Vietnam, dropping anchor at Qui Nhơn to start two months as "boat haven" in support of the U.S. Army's Qui Nhơn Support Command. Two boat repair divisions – consisting of "Whetstone" sailors and Army soldiers – worked 12-hour shifts, 24 hours a day, to repair Army landing craft in "Whetstone"'s capacious well-deck aft. The display of Army–Navy cooperation facilitated the vital offloading of ships delivering cargo to Qui Nhơn. At the end of the time spent at the port, "Whetstone" received a plaque, commemorating her hard work, from the U.S. Army's 1st Logistical Command.