The engineering of a rocket thrown Torpedo and or a platform to deliver that weapon is not new nor is a high speed Torpedo. Usually, at least in the last say 40 years, when DOD and or some other Gov't entity requests a system, they usually request a countermeasures to their own system. At times funding will not allow a countermeasure to be developed but for the most part it is at least studied and a threat assessment is established. Failure of this was shown in the rescue attempt with the Iranian Hostages. We were blown out of the sky by our own SAM missiles that we had sold the Shah. I mentioned this only in the fact that ANTI-Missile systems and ANTI-Torpedo systems are out there and in continued development. These ANTI systems came out of the engineering that produced the original systems.
I believe and pray we have kept our edge in R&D and have a countermeasure established. There's a lot of programs hidden within programs that fund the research needed to combat our foes of today and the future. There is also many, many systems that cannot be mentioned and or confirmed. I hope there is one that will defeat this one.
"The smallest minority on earth is the individual. Those who deny individual rights cannot claim to be defenders of minorities." --author and philosopher Ayn Rand (1905-1982)