Quote:
Originally Posted by T@T
Turning off the transponder doesn't make a plane invisable to radar, it's for identifying them.
|
So this statement from the article is incorrect?
But over longer distances where radar coverage is limited – ie usually when planes are flying across oceans – they use another system, Automatic Dependent Surveillance. Here the aircraft transmits its own signal and gives its position via satellites. Maclean says: "Once you go outside primary radar coverage, which would normally be about 100 miles offshore maximum, you are relying on the plane to be transponding."