From the transcript

Arsenal— Arsenal 2 will be 2 million square feet of manufacturing space and will create more than 3,100 direct jobs and thousands more indirect jobs. Arsenal 2 will be built to produce a range of assets that are integral to the Virginia-class attack submarine. It will add an entirely new source of capacity to the program, and it will significantly increase the amount of work that the broader undersea industrial base can move through the system. Building Arsenal 2 from the ground up means we can design the factory around how submarine components move through production. We will minimize unnecessary movement, put equipment where it's needed most, and connect engineering directly to the factory floor through software.