they re very covert by nature. hms tireless will be in the area. i think the key to all this, ashleigh, the passive sonar. the passive sonar is the piece of technology that will detect and listen for that ping. it s not active. it s not like this. it doesn t send out energy and look at the energy coming back. it just listens. there s a number of assets he can use. i d be putting the p-8s out there. po siden aircraft. the p-3s. i d be dropping the passive sonar boys into the water. the the sonar boys they hold 100 phones as well. they sit in the water. and listen? the question i would have for tim, is there a scenario where you can have the sonar boys floating on the surface which wouldn t detect? yet the auv would? of course. sound is very very different in the water. it has layers that it can t penetrate. looking at what the chinese heard for one and a half