CIMSEC – Today’s maritime security environment recalls the early days of the United States Navy, when its economic and geographic limitations helped create a technologically bold yet focused fleet architecture. Just as the United States Navy couldn’t out build its rivals then, it can’t out build the Chinese Navy today. Even so, by drawing from its best traditions, and implementing a fleet design incorporating mission agile platforms and platform agile payloads, the Navy and Marine Corps team can affordably produce a fleet and fleet Marine force fit for purpose – even as those purposes change with the decades.