we're at 17,000 feet on the north part of the pings. we're at now 13,000 feet deep. this is really great coverage with the bluefin right now. but it's a little bit more topographic. a few more bumps for things to hide in so the bluefins that to do a nice job moving around the bumps to see it and it doesn't even know -- this is not realtime in is not a video game where somebody up on top of the ship is looking at everything. they have to bring this thing back up, download all the data, and then look at it. we wish it was realtime but it's not. >> with the different topography there is a challenge. if you dip into the canyon, if you will, that you can really damage the bluefin. and you wouldn't know until obviously you came back up. with this last 5%, with the challenge -- the fact that topography is more of a challenge, that to me says it's more time consuming. >> right. let's think about this. if we have a dot, the ping, the strong ping, we went six miles around it in a raid yudius arou.