captain tim taylor, a submersible specialist and a science correspondent for pbs news hour. miles, we were so optimistic so many times in the last 32 days. satellite images, plane sightings of orange objects. is this more promising than those earlier ones? do you think this is a legitimately promising sign? >> in a word, yes. what i like about this whole thing is it matches that arc. it validates the inmarsat data. it correlates with the half handshake or pink which we presume to be the last communication with the aircraft and satellite itself. >> the fact that it's taking place where we would want it to be from these other data points? >> yes. it just verifies what we're hearing with these hydrophones. unfortunately, the challenge is, it's in an extremely deep location. getting to it will be another matter entirely.