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why would you wanna mask/shadow the plane if you can just simply turn off the signals manually and fly low altitude and not get detected? this make no sense... enlighten me if you will.
The closer you are to the antenna the lower you have to go is the first reason.
The second is because commercial planes don't do low. Fuel consumption jumps, engines overheat, and the rough air can damage the airframe.
Maybe if I answer my own questions with what I believe to be the correct answers, you might not agree with my post:
Do transponders being turned off make a plane invisible to radar? NO
Do transponders being turned off make a plane invisible to other planes? YES
Does flying in another plane's radar shadow make a plane essentially invisible to radar? YES
The farther you are from the antenna the bigger the gap can be, because of the resolution of the radar. As you get closer you have to tighten up. If they crossed India they would probably have to be close enough the other aircraft would notice.
Maybe he performed this manouver.
reply to post by roadgravel
I'd say at least a quarter mile to keep the bow wave from affecting the other plane. If you're far enough from the antenna it should be one target.