Considering how everyone at Pentagon is getting their panties in a bunch it might be decent idea after all. Can't shoot down a torpedo with ABM shields (not that it works but you know...).
Problem with this idea is - what's to stop the US developing one too?
IF you look at the world map , Russia is a continent connected to a GIANT Land Mass
of ASIA.. So a Poseidon like system will be minimal the damages it will do to Russia
economy ,since Russia Trade can come from Land.. Russia actually don't need to use
the sea for most of its trading. China near and Europe too.. and the biggest exports of Russia
are Energy , natural gas to Europe.. so those pipelines ,are easy to repair or rebuild if destroyed .
And Americans can't use nuclear weapons so close to their allies.. for example if they attack ST petersburg.. it will affect Findland and Estonia too the radiation... And guess what ? Russia don't have such problems.. Russia can nuke the entire eastern Coast of US and it will not affect Europe ,only US.. and contrary to Russia , that don't depend as much of sea ports trading... US economy most of
what they export is through Naval ports.. So Poseidon Benefits far more Russia ,than it could to USA.. Russia can continue trading with Europe , through land Route ,using Belarus..no problem if ST peterburg coast nuked.. Ukraine for sure will be invaded by Russia in case of world war 3 scenario with US to secure a road to Europe from eastern Europe and so gloves will be off ,anything will be valid.. no longer international laws will matter.. that if US start/provoke a World War 3 vs Russia.
Poseidon can also be used to create a giant 50 meters wave Psunami towards US eastern coast..
that is very swampy and under water.. just the other day Miami was a small part of it under water after bad weather.. imagine the detonation of 6 x 50 megaton bombs.. in the atlantic.. The huge wave will cover in radioactive water most of the eastern coast of US..
Russia in the other hand ,is on a high elevation tectonic place... Lavrov even spoke about this..
in case of a nuclear war with US... So Russia is less vulnerable to flood than US is.. and the problem also that to detonate a nuke in any part of the northern coast of Russia will affect most important US allies too..
So in short because Russia trade don't depend on water routes.. can be done all through land routes..
So is very little what US can gain from developing a drone like Poseidon .. US in the other hand .if their eastern Coast is destroyed by underwater nukes ... their entire trade with Europe and latin America will be shot down... So Poseidon was developed by Russia to be 100% sure..
that Americans understand ,that Russia have the capabilities ,to completely shutdown US trade with Europe.. while Americans can't do that to Russia.. since can't shut down the territorial routes.
and since Russia don't have an offensive large navy or aircraft carriers ,Russia military is mostly land defensive and airforce.. and underwater subs.then neither US will benefit much from a Poseidon Submarine..something they can do with their stealth planes armed with Glide nuclear bombs.. US in the other hand have most of their military , depends of their Navy.. So if US have 12 aircraft carriers.. then All Russia needs to defeat US navy is 12 drones.. US aircraft carriers will be very easy targets . Russia simply detonate the drones with 50 megaton warheads under Aircraft cariers formation.. wiping not only the aircraft carriers but entire warships escorting it..
Poseidon if Russia produce lets say a Dozen of them..each one with 4 or more drones.. it will allow to completely crush US ,coastal zones in a surprise attack and their entire navy too.. if all of them positioned in place.. So US warships will be forced to abandon the deep water and navigate in very shallow waters all the time to avoid Poseidon. Hypersonic missiles can do the same but needs more missiles and Russia don't have any on their submarines yet..
Those drones are kamikazis nuclear drones and will be very hard to counter that.. specially in deep waters.. the Poseidon carrier could also have some versions of them , armed with 100 ,200 to 400 hypersonic underwater launched nuclear missiles.. So is an effortless elegant weapon .. because Russia could park those drones for months ,near US eastern coast.. and take by surprise US and allow Russia to sneak a very powerful massive nuclear strike of many underwater nuclear armed drones. without warning ..if they sneak all the way to the coast..
Poseidon ,to understand the kind of strategy capabilities ,it can achieve..
it can be used as a suicide terror underwater sub super nuke bomb attack.. that Rush to the target and is difficult to stop it..