- by multiple fighter jet pilots (in different planes)
- picked up by the fighter jet's radar
- picked up by the USS Nimitz's radar.
So yeah...
If he built the software that automatically rejects such mistaken identifications, he also knows in which situations you'll get a false positive reading, and can tell his friend the perfect timing for the prank.
For an example of this kind of prankster game see Woz’s short videos about how he sources (actually real, but he intentionally does not say that) two dollar bills in pads from a local printer “who gets them from another very high quality printer.” He knows some people get what he’s doing and others don’t, and that’s part of the fun.
And some people transition during the exposition from being people who are being duped, to people who realize they were temporarily duped. That’s another part of the fun.
> During a routine training mission in 2004, Dietrich and her then-commanding officer had noticed an unusual "churning" of the ocean surface before seeing "a smooth, white oblong object resembling a large Tic Tac breath mint flying at high speed over the water."