Wouldn't it make sense to make an air droppable version of Poseidon - carried by a modified large transport aircraft?
With two or three dedicated submarines carrying these weapons the west will have to designate task groups to follow these submarines around the world to ensure they can destroy them on command... the irony is that they could be designed so the Poseidon weapons are released silently so those groups could be chasing these subs around long after they have dropped their weapons to the sea floor to quietly head off on a voyage to their primary targets.
The cost of three task groups chasing three subs that don't have any areas they have to remain in... it is not like their target is London and their range is 5,000km so they have to remain within 5,000km of London at all times... they can go anywhere they like... in any ocean... I would expect they would spend most of their time in the southern oceans... once they leave port they are on their own till the food runs out, so zipping over to the South Atlantic for a couple of months sailing around... some times fast sometimes slow and sneaky... constantly practising evading... hell once they have dropped off all their Poseidon missiles they can turn around and try to hunt the ships trying to track them... while their poseidon missiles escape...
I'm wondering if it has a 200 km/h speed ,creating a gas bubble around the Poseidon's hull ,so how the torpedo propellers work in a gas atmosphere ?
What ever its speed is they could easily design it so the tail sticks out the rear so the props have something to do....
Hell they could have some sort of hydrodynamic spike sticking out the front sucking in sea water that gets pumped through the weapon to the nuclear reactor and super heated and blown out the back end as superheated steam for propulsion for all we know...
The only scary thing about it is it could inspire similar weapons by terrorists. Maybe not Nuclear powered but maybe solar power...much slower but gets there eventually.
They would always be able to do that anyway...
But look how long it took to go from cruise missile (V1 Buzz bomb from WWII) to 11/9 using planes as bombs... quite a gap.
I doubt its that fast. There is no real advantage to it being fast and it will generate a lot of noise.
Could turn that around and say with active sonar there is no value in being quiet, but fast is harder to deal with when you are 1km underwater...
We still do not know how its terminal stage works. Nuclear tidal wave? Doubt it. Maybe hit a fault line and trigger a massive earthquake? Possible but not predicable enough. Massive nuke warhead to obliterate coastal cities? Highly possible. Lauching cruise missiles to attack any city? Also possible.
Not every target will be near a fault line... plus how does the weapon position itself perfectly on a fault line to get the effect you want... equally you would need very accurate information on the worlds fault lines... what if you set it off on a fault line that is not under high tension... the purpose would be to force the release of built up tension releasing energy thousands of times more powerful than any bomb we could make...
Even if it just approached coastlines and released a nuclear bomb to drop to the sea bed and detonate... enormous volumes of super heated salt water and mud and sand vapourised and released near a city would be devastating... this thing could carry 100s of small nuclear devices... the smaller the dirtier, so it will be irradiated superheated mud and water.... at a time when the whole country is likely trying to recover from those ICBM and cruise missile and SLBM missile hits...