82 years ago today, on 11 November 1943, Iris-class 180-foot buoy tender USCGC Bittersweet (WLB-389) was launched at the Zenith Dredge Company, Duluth, Minnesota. She was transferred to Estonia on 5 September 1997 as 'Valvas' (PVL-109), and is now a museum ship at Eesti Meremuuseum, Tallinn, Estonia.