Analytical look at propeller-free propulsion concepts, including the patented work of Iranian-German inventor Mohsen Bahmani. As the global transportation sector accelerates toward decarbonization, maritime shipping faces mounting pressure to evolve. Cleaner fuels, electrification, hydrogen, ammonia, hybrid propulsion, and smarter vessel design have all become central to sustainability discussions. Yet one of the most fundamental engineering assumptions in marine transport has remained largely untouched: the propeller. For over a century, propeller-based propulsion has powered everything from cargo ships and ferries to naval vessels and offshore platforms. It is proven, scalable, and deeply optimized. But sustainability in modern transport is no longer…