.Large commercial ships have mysteriously disappeared for 15 ships and 15 aircraft, no signal "sos" or radio for help any strange thing to wonder. The most alarming is that the ship is a large ship and 15 aircraft.Help in navigating the modern age. Such as radio communications. We Derby Navigation Sonar Navigation. Search was done for months. However, the results fail Flame totally not even a shadow.Lead to confusion. To those who are hopelessly behind. What happen to the navy ship that lost 900 people who will have the answers to these questions.