And third, each ship has a display of systems (a Ship Systems Display, or SSD) that acts as a schematic diagram of a particular ship in play. Each class in the game has an individualized SSD, and most expansions revolve around providing new classes and 'variants' of ships to the game, with new SSDs. These displays consist of check-off boxes for all the ship's structure and systems (shields in all six directions, systems and hull damage, how much power the engines produce, how many transporters there are, etc. checked off when damaged) in the general layout of the ship, along with general reference information for that ship (tracks to check off use for weapons in limited supply like drones, shuttles, probes, plus weapons fire resolution tables, firing arcs, and miscellaneous ship data).