Posiedon: Russia's new nuclear super weapon. Creator of radioactive tsunamis

The Poseidon is a Russian Unmanned Underwater Vehicle with a nuclear propulsion system and nuclear warhead. Essentially it is a robotic nuclear torpedo, or unmanned mini submarine that has unlimited range.
Only a special carrier can transport it. The "Poseidon" can have not only a conventional nuclear warhead with a blast yield of 2 Megaton, but also a "dirty" one, designed for maximum radioactive exposure. Other sources suggest that Poseidon is also capable of carrying conventional warhead. The warhead is reportedly 1.5 meters in diameter and 4 meters long.
Poseidon was designed to be carried and launched by submarines. Its main role is to engage strategic enemy targets, such as carrier battle groups and naval bases. The Poseidon will approach its targets and detonate its nuclear warhead.

Russian sources reported that Poseidons will operate at depths of up to one thousand meters, making them difficult to intercept. Though typical depth could be around fifty meters to hundred meters. There are some indications that this UUV can operate under Arctic ice pack, where it is much harder to detect and engage.
US-built satellites with infrared sensors to track Russian missile launches will be useless in the case of Poseidon: “ Poseidon was designed to radiate very little heat and move silently at speeds of more than 100 km per hour”
"Poseidon" can lie in wait for several weeks off the coast of the enemy in preparation for a coordinated strike.
A nuclear reactor gives the weapon essentially unlimited range. This gives it new levels of operational flexibility in terms of launch and target locations.
It uses internal guidance system, possibly with external mission update. It is also fitted with obstacle avoidance sonar.
Poseidon can be used to detonate a nuclear warhead in dangerous geophysical zones, which will provoke serious natural disasters on enemy territory. For example, by collapsing the southwestern slope of the Snaifelsjokull volcano in Iceland, you can get a giant wave that will move in a southwesterly direction.
The use of nuclear weapons in dangerous geophysical zones can be even more effective means of destruction than inflicting nuclear strikes directly on enemy territory.