Action Stations: Convoy Module. Used in conjunction with ​either Action Stations: Atlantic, or Battleship Captain, 3rd ed. (one of which must be owned to use this module), this module provides: a four-page rule folder (optional rules, and convoy scenarios), and 14 color, thick card counter sheets of ships from British, German, and French navies of WW2, along with DD, DE, frigates, corvettes, armed merchants, and merchant ships, approx. 475 ship counters overall. —description from the publisher