The Bluefin has certainly had its share of challenges in its search for Flight 370. Its first two dives were cut short due to technical problems. So far, there has been no sign of the missing jet.
There are questions as to whether the Bluefin-21 can dive deep enough, and whether it can send back pictures that are clear enough.
So is there anything out there that can do the job better?
Rosa Flores has the story.