@maritime.dream on Instagram: "📌 You most probably never saw this! Watch till the end and see all types of stabilizers and techniques for stability onboard! 📌 Fin stabilizer A ship fin stabilizer is a device fitted underwater (usually on both sides of the hull ) to reduce a vessel’s rolling motion caused by waves. They are especially common on cruise ships, ferries, and naval vessels to improve comfort and safety. ❔How they work? Fins: Hydrodynamic surfaces extend from the hull into the water.