phil
Maybe, BUT that doesn't provide a lot of confidence in air defence systems? Gosh that really was a North Korean missile that took out Port Dixon two days ago?
Not sure of your experience in Air Defense Radar, or AAW (Aegis and NTU on USN ships of 80's and 90's is my experience), but a missile heading toward a target gives off a different cue to the radar operator than an aircraft descending and crossing at speeds considerably slower than a missile.
That said, I am not up to scratch on Malaysian Air Defense kit, it's been over 20 years since I was at sea in that area and I am sure much has changed.