As the last Typhoon class submarine is retired, another underwater giant is starting construction. The German MUM (Modifiable Underwater Mothership) will be the largest autonomous underwater vehicle in the world.


World's Largest Submarine Drone Being Built In Germany - Naval News
As the last Typhoon class submarine is retired, another underwater giant is starting construction. The German MUM (Modifiable Underwater Mothership) will be the largest autonomous underwater vehicle in the world.
