Originally Posted by
stilton
. . . .
I asked him why and he informed me when you did this the aircraft would ‘disappear on radar’ . . .
I wonder if he was confusing a/c bank with loss of contact for about one sweep in MTI.
Moving Target Indicator looks at the radial speed of the target and, if it is zero, assumes that it is a ground return and does not paint so, at the precise moment a passing target is tangential to the radar head, it will not paint on the PPI screen.
I guess, if you flew a perfect circle around the radar aerial, you wouldn't paint.