>> 50 to 70 people. >> 50 to 70, 5-0 to 7-0 people? >> yes. it's of considerable size. with enough capacity to serve a large area and the idea is to have them spread in a sway that everybody has a chance to access one within a reasonable amount of time, basically responding to tsunamis in places maybe the warning doesn't reach or there isn't any warning, remote places. >> have you -- have you been able to try something like this out? there's a patent for it. it's not manufactured yet, correct? >> that's correct. we're working. we need research on the development and prototyping. but i can tell you since the 1850s, french inventor has been working with concrete boats and ships, actually the u.s. and world war i commissioned an emergency fleet made completely