警備艦
"Elm" and all but one of the Juniper-class buoy tenders are named after trees. She is the third Coast Guard ship of this name. The first "Elm" was a derrick barge launched in 1919 to maintain aids to navigation in the Hudson River. The second USCGC "Elm" (WAGL-260/WLI-72260) was a buoy tender launched in 1938.