before, where the indian ocean is on the southern ocean down here can be known for storms, can be known for big waves. all of which on any given day may make it impossible to launch the bluefin and to retrieve it. it is a hazardous operation. it s a difficult thing to do. that can slow down the process. beyond that, though, the depth of the ocean here is a big challenge. at its deepest it s a little over three miles over here in the area we re talking about. that s the most shallow. about 1 1/2. here s the thing. we really don t know much about the bottom out here. there hasn t been that much studty of it down here at, say, 2 1/2 miles down. there may be hills, there may be many things that can interfere with the operation of the bluefin. on top of which this is utter darkness, immense, immense pressure, and just above freezing, wolf. so some of the many challenges already facing this device as they put it into the water. wolf? enormous challenges. tom foreman, thanks very much. le