https://www.thedrive.com/the-war-zone/21414/what-supersonic-anti-ship-missile-did-china-hack-from-the-u-s-navy
These same cells currently used for Tomahawk cruise missiles could be configured to house an altered SM-6-booster combination capable of launching the missile submerged without destroying the launch cell. If such an arrangement were developed and implemented, the variety and flexibility of firepower that America's submarine force would possess would greatly increase.
TEST PLATFORM DARPA BOAT?