You've seen the videos, but how does it work? So, here it goes! Inside a vacuum-enclosed sphere, a steel flywheel spins at speeds of up to 9,750 rpm. When the boat rolls, the Seakeeper tilts fore and aft (precesses), producing a powerful gyroscopic power known as angular momentum to port and starboard that counteracts the boat roll. Check out https://www.seakeeper.com/faqs/how-does-a-seakeeper-work/ to learn more! | Seakeeper