Depth Concerns News Today

>> weve been talking about the search under the sea. search on the surface has not let up either, almost two dozen ships and planes are eye balling more than 20,000 square miles for any sign of debris. lets check in with aaron mclaughlin. good morning. whats the latest? >> reporter: good morning, john. we know as of 9:00 a.m. local time, the bluefin was in the water over 12 hours later, not clear if it has yet completed that fifth mission. missions can take some 24 hours. we are learning more de...

Details about its fourth dive, happening last night. it reached 4.7 kilometers beneath the oceans surface, which is significant, given it was originally thought the upper reaches of its death capacity was 4.5. it had to cut its first mission short due to depth concerns. but engineers analyzed the bluefin- bluefin-21s hardware and they believe it can now go as deep as five kilometers, which is important, given the area theyre currently searching is the most probable area they believe they can fin...