floor. >> it's just remarkable to see it like this. can you get this in one pass? or does it need multiple passes? >> it depends how close the vehicle is to the bottom or how high and big the area is but it could be one pass or multiple passes. >> i want to look at another image from a side-scanning sonar. this is a close-up of one ship. >> this is fantastic. this is the path of the vehicle. so the robot is heading in this direction, sending out pings to either side like this and the sound comes off and bounces off objects. when you see that, it is a hard return. a shadow behind it. this is a ship sitting on the bottom and you can see it went over the top of the ship. it does leave a gap directly beneath the vehicle. why they call it a side scan or a side-looking sonar. >> when you get an image like this, it is actually two images with the center where the vehicle s >> it is two beams on either side of the vehicle. exactly. a port side and a starboard side. >> i want to look at an image, not from a bluefin but one you were involved with.