The Presidential Yacht Potomac President Franklin D. Roosevelt's Floating White House A Brief Histrory The Presidential Yacht Potomac Served Presidential Franklin Delano Roosevelt from 1936 to 1945. The ship provideda venue for important meetings and receptions, including the King & Queen of England on the "first ever" Historic visit of the reigning British monarch to the United States. The Rich History of the Potomac is available for you to enjoy. Each cruise is narrated, and includes tours by Potomac Docents as part of your experience.