> and if that were the case then I would expect sonar operators over a large part of the region to hear the black box locator Apparently the pingers are only a

> and if that were the case then I would expect sonar operators over a large part of the region to hear the black box locator Apparently the pingers are only audible for 2-3 km [1]. [1] http://www.hydro-international.com/issues/articles/id1098-Air_France_Flight_AF.html http://www.hydro-international.com/issues/articles/id1098-Ai...