The British 15-year building program (for a game)

I speculated about what a 15-year British building program might look like:

30 battleships         60 fleet minesweepers
12 battlecruisers      120 coastal minesweepers
30 heavy cruisers      30 fleet tugs
60 light cruisers      90 harbor tugs
120 destroyers         15 destroyer depot ships
15 aircraft carriers   10 submarine depot ships
60 submarines          6 repair ships
8 cruiser minelayers   45 fleet oilers
60 sloops              24 transports
                       15 seaplane tenders
                       15 seaplane carriers