In an 8 September 2016 announcement, the Navy revealed a radical change in operations and organization plans for the LCS. Of the 28 Flight 0 ships built or on order, the first four, two of each class, will be turned into training ships and the remaining 24 will be divided into six divisions of four ships each; three divisions of the "Freedom"-class based at Naval Station Mayport, Florida and three divisions of the "Independence"-class based at Naval Station San Diego, California. The new organization does away with the LCS' signature interchangeable mission module concept, with each division being tasked to fulfill one of the three mission sets. Crewing is also changed into a more simplified two-crew "blue/gold" model, like that used on submarines and minesweepers, where ships cycle to forward deployed locations with the two crews swapping roles every 4–5 months; aviation detachments will also deploy with the same LCS crew, creating an arrangement of a core 70-sailor crew to conduct the warfare mission and a 23-person air detachment.