*The external coordinate system of the U.S.S. Enterprise utilizes a three-dimensional vertex and vector measuring scheme, with centimeters as the operative value. The three axes are labelled X, Y, and Z, with each ship configuration (Docked, Saucer Module, and Battle Section) having its own specific origin. Structures and objects within the U.S.S. Enterprise are identified by an internal coordinate system following the form "12-3456-000/000/000." The first two digits refer to the deck number; the second group of four digits specifies the sector and compartment number (see diagrams at left). These first two groups of numbers are generally used as room designation numbers within the spacecraft. The final group of three-digit numbers refer to an XYZ coordinate within a compartment. *Source: Back of card