Stanton Friedman discusses UFO propulsion systems in the following article, talking about the use of "sea water" as a conductive fluid.
"In the mid 1960s an electromagnetic submarine designed by Dr. Stuart Way, [sic] who was on leave from Westinghouse Research Laboratory, was successfully tested. It made use of the fact that electric and magnetic fields at right angles to each other produce a (Lorentz) force at right angles to both. The force pushed against the surrounding electromagnetically conducting fluid (seawater), which pushes back and moves the submarine." (Ref. http://www.theufochronicles.com/2005/07/ufo-propulsion-systems-by-stanton-t_13.html)
1995, WIDNES:
A woman saw a "bell shaped object" hover over the Mersey near Fiddlers Ferry power station. It appeared to be "sucking up a column of water" from the river. Six other passers-by also witnessed the event. This was the start of a two-month spate of sightings over Halton. Many witnesses saw all manner of unusual objects and lights, ranging from bright star like objects, flying discs and black triangles to huge wedge shaped objects which were described as being larger than two football pitches. (Ref. http://www.waterufo.net/item.php?id=849)