As a member of the 1st Signal Company, 1st Marine Division, in the Solomon Islands, Master Technical Sergeant Belet was at Guadalcanal on the night of 9 and 10 August 1942, during operations against Japanese forces.

Following shakedown, she stood out of Norfolk, Virginia, on 13 August 1945 with a full load of passengers, bound for World War II service in the Pacific Theater of Operations.

The next day while at sea, the ship received the news of the surrender of Japan, but she continued on to San Diego, California, where she arrived on 27 August 1945.

She stopped at Pearl Harbor, Territory of Hawaii, only long enough to take on fuel and provisions and then touched briefly at Eniwetok Atoll before arriving at Saipan on 17 September 1945.

On 11 October 1945, she relieved the United States Coast Guard Cutter USCGC Taney (WPG-37) as port director ship at Wakayama, Japan.

On her homeward voyage, Belet carried returning servicemen into San Diego in January 1946 and was then ordered back to the United States East Coast.