During her third hunter-killer patrol , from 20 August 1944 to 2 October , '' Frost '' rescued survivors of who had capsized in a hurricane during the night of 13 – 14 September . Training at Guantanamo Bay and Bermuda preceded the next patrol , from 23 January 1945 to 7 February , during which her task group formed a part of the escort for , carrying President Franklin D. Roosevelt toward the Yalta Conference . Additional training in Narragansett Bay and Casco Bay prepared her for her final antisubmarine patrol , during which she won the Presidential Unit Citation , for her high achievement in joining in sinking two submarines on the night of 15 – 16 April
Yalta Conference
Yalta Conference
USS Frost (DE-144)