The USCGC Acacia (WLB 406) was second to the last of a fleet of 39 similar 180-foot seagoing buoy tenders completed during World War II. Acacia was named after the former United States Lighthouse Service tender Acacia, the only tender sunk during World War II. Acacia is a multi-purpose vessel, nominally a buoy tender, but with equipment and capabilities for ice breaking, search and rescue, fire fighting, logistics, and other tasks as well.