In May 1975 "Acacia" sailed from Port Huron to the Coast Guard Yard in Curtis Bay, Maryland for major renovations. The majority of "Acacia's" crew transferred to the freshly renovated USCGC "Bramble" and sailed their new ship back to Port Huron. "Acacia's" main electrical motor was renovated, and new electrical switchboards and wiring were installed. Her main engines were overhauled. Crew spaces were modernized and enlarged by reducing the size of the forward hold. Water pipes were replaced and a new sewage system was installed. A bow thruster was added to improve the ship's maneuverability. The electric drive that ran the cargo boom was replaced with a hydraulic system. Over $9 million was appropriated for this renovation.