Some video links about marine magnetometers

Here is a video about the search for the civil war submarine the
Alligator...it includes our colleague Dwight Coleman from URI and IFE
http://www.youtube.com/watch?v=QRGW99QZoeE&feature=player_embedded

and here is an introductory video about magnetometers by Ross Johnson
at Geometrics.
http://www.youtube.com/watch?v=r_C_uma9nzQ&feature=player_embedded