therefore, it makes it more difficult to pinpoint a search location. paula newton, cnn, ottawa. more on this story. i m joined by rick armstrong who was a master diver with the u.s. navy. thank you for being with us. good evening. how are you? i m doing well, thank you. this is a story that everyone is talking about. a question i keep being asked by people, how this submersible was able to lose contact with ocean exdecisions, given that it isn t self-sufficient. what sort of track ing technoloy is available here? titan is the name of the submersible, and did not have a navigation system what i read about the machine itself. they were guided in by sonar