4 ms·

To make things even worse, sea water strongly attenuates electromagnetic radiation at radio frequencies...

• ars 17y ago
  It uses sonar. Radio would be useless under water.
  • TriinT 17y ago
    I suppose it emits both in radio and sonar, right? What if the airplane crashes over land?
    • kqr2 17y ago
      It only activates the sonar if it is under water: http://trueslant.com/milesobrien/ http://trueslant.com/milesobrien/