those on board including the ceo and founder stockton rush who owns ocean gate expeditions and the missing sub. so i want to give you a sense of what s happening here. this is the horizon arctic, the sistership to the polar prince we believe this ship may be headed out, a c 17 from the u.s. that just landed at the airport here. it is going to be gear down here. a coast guard ship from the canadian coast guard left the harbor here and is on its way to the search zone as well. just a massive effort and a lot of hope this one turns out well. jake. miguel marquez in st. john s newfoundland, thank you so much. let s bring in mr. reese,
north atlantic ocean. coast guard warning that oxygen could run out on board in less than 40 hours. cnn s senior national correspondent miguel marquez is at the port where the troubled journey began. now a key launching point for the search efforts. miguel, what are you learning? reporter: there s a massive amount of resources headed to where i am standing. st. john s in newfoundland in canada. it is all hands on deck as resources from both the u.s. and canada move in. this is the sister ship to the polar prince. we suspect that it may be loading up with gear to take out there. it is an absolute race against time. this is a complex search. reporter: a complex search now more complicated by time, which they re running out of. we know there s about 40 hours of breathable air left. reporter: deep water submersibles and gear converging on st. john s newfoundland from the u.s. and canada.