Question: Is the hypersonic ballistic anti-ship missile option better than a subsonic cruise missile option?
Subsonic anti-ship cruise missiles are capable of hitting moving targets. A hypersonic ballistic missile could be used to hit ships docked in a port defeating shore-based anti-ballistic missile systems.
The most recent examples of large warships being sunk or damaged by anti-ship missiles have been through the use of cruise missiles.
The R-360 Neptune missile used by Ukraine against the Russian Black sea fleet has been successful sinking at least two Russian Navy warships; the guided missile cruiser Moskva and the salvage ship Kommuna.
On 23 August 2023 a land attack variant of the Neptune missile was used to destroy a S-400 missile system radar, deployed on Cape Tarkhanut in Crimea since 2016.
The R-360L extended range variant used for land attack has a range of 1000 km carrying a 260 kilogram warhead.
TL;DR
Russia losing its Flagship in 2022 was plain dumb on their part. As per what's publicly known, they made too many blunders that night.
The S400 has been known to have 2 major blindspots:
- Low flying and slow moving vectors (Terrain hugging CMs/Low Altitude Drones) - these vectors are a blindspot for a number of radars anyway. Besides the S400's SAMs are optimized for high altitude and fast moving vectors so it usually relies on other layered SHORADS to deal with low flying/slow flying vectors. There have been multiple reports about Data Link issues of Pantsir with S400 radars that led to mission kill on S400 as well as 15+ Pantsirs.
- Near vertical diving high speed vectors (e.g. ATACMS/CM-400AKG) - radars for S400 will usually only detect these vectors very late (during their terminal dive) and won't get a successful lock-on in time because of the speed of the vectors. This is what Ukraine exploited b/w 2023-24 using ATACMS and we did too in May 25 using CM-400.
The more arguable point with CM is that many are still subsonic. Mach 0.8-0.9 can work for shorter ranges (under 200-250 km) but for over 400-500 km range it takes ~ 30 minutes. That's enough time for ADS and even naval maneuvers to avoid impact, besides that amount of time even risks putting guidance assets in the kill chain at risk as well. However, a supersonic CM changes the dynamic altogether.



