full keel Directory References Images Discover How Many Countries Are There in the World? 10 Great Sports Rivalries How Deadly Is Quicksand? Nostradamus and His Prophecies Why Is the Mona Lisa So Famous? Timeline of the American Civil Rights Movement What Is the Most Widely Practiced Religion in the World? Contents full keel shipbuilding Ask the Chatbot a Question Ask the Chatbot a Question Also known as: ballast keel Learn about this topic in these articles:types of keels In keel…of main keel—properly, the “full keel,” or “ballast keel”—is a vertical downward extension of the boat’s hull, narrowly V-shaped; it is usually ballasted or weighted for stability and lateral resistance.Read More