Electronic countermeasures from F-16 took it out or hit-to-kill interceptor missile?
Spoofed launch order
Was fired from US sub modified to fire SAMs
The command staff on the sub would have to be complicit….all of them if that were the case… a lot easier to spoof a launch order to the sub that way they are just "doing their jobs" in launching.
I am guessing the F-16 was using the new CUDA hit to kill missile OR an ECM/Laser pod to confuse the missile.
New (still quite secret) Hit-to-Kill missile for the F-35 unveiled: the Lockheed Martin “Cuda”
https://theaviationist.com/2012/11/30/cuda/