The present invention, in various embodiments, is directed to a geophysical system and method in which a transmitter coil is oriented with its axis horizontally, and a sensor is positioned below the coil to measure an ambient electrical and/or magnetic parameter associated with a conductive medium surrounding...http://www.google.com/patents/US8148992?utm_source=gb-gplus-sharePatent US8148992 - Underwater electric field electromagnetic prospecting system
