Operation Atlantis was a project, headed by Werner Stiefel, developed with the intent of establishing a libertarian

Libertarianism

Libertarianism, in the strictest sense, is the political philosophy that holds individual liberty as the basic moral principle of society. In the broadest sense, it is any political philosophy which approximates this view...

 country on international waters. The operation set out to do this by launching a ferro-cement boat into the Hudson River

Hudson River

The Hudson is a river that flows from north to south through eastern New York. The highest official source is at Lake Tear of the Clouds, on the slopes of Mount Marcy in the Adirondack Mountains. The river itself officially begins in Henderson Lake in Newcomb, New York...

 in December 1971 which was piloted into an area near the Bahamas. After reaching its destination it eventually sank in a hurricane.