http://blogs.ei.columbia.edu/2011/03/18/icebridge-team-settles-in-the-north/
Magnetometer (stinger) on the tail of the P3
Please right click (PC) or control click (MAC) to download the fullsize version.
http://blogs.ei.columbia.edu/2011/03/18/icebridge-team-settles-in-the-north/