A conductor moving through a magnetic field generates an electromotive force (emf), leading to the question of whether a highly conductive liquid like seawater could similarly generate emf when moving through a magnetic field. While the principle is sound, practical applications for generating useful energy from this phenomenon have not yet been realized. Magnetohydrodynamic (MHD) drives, which utilize magnetic fields for propulsion without moving parts, represent a related concept but have not been widely implemented. Some existing technologies, such as electromagnetic speed logs for vessels, demonstrate the principle in measuring flow rates. Overall, while the theory is established, practical applications remain limited.