Welcome back to the our channel for a discussion about the US Navy’s plan to replace its Ohio-Class submarines with new Columbia-Class vessels. The newest submarines do not use "the latest in technology, like sail-mounted dive planes.." Those have been deleted since the Seawolf class, (which is no longer being built) in favor of retractable bow planes now being set into the hull itself. Between the B-20 being replaced by the b-21 and the ohio with the columbia, things are going to be nuts. Both of those legacy systems are still top in the world, and have been since introduction. Both of these systems are going to be crazy. The South China Sea might be too shallow for this $9 billion US ballistic submarine with only an average depth of a little over 5,000 feet. And the Taiwan Straight is only 196 feet deep. That's why a US nuclear submarine collided with an uncharted seamount 2 years ago.