you would have to be flying. they only have one side-scanning sonar right now. is this the right piece of equipment. i don't understand why not have multiple? >> you heard captain matthews say this is a tactical survey. they thought they could throw the dart a right at the bulls-eye. they got an area instead of a point to throw the dart at. we did things differently with air france. we said let's start to the west and sweep all the way to the east. >> and you had three? >> we had three vehicles at once. >> there's no reason you can't have multiple vehicles. >> they could do that. but he mentioned going to high probability areas. what we would rather do is start with a wide area. instead of doing a three by fire area, let's do a six by six area and if the aircraft is there