An ST box was a device which, when attached to the sublight drives of a ship, could mask its transponder code with that of another ship. The use of ST boxes was considered standard operating procedure by Rebel Alliance member Deen Voorson, and was described in Cracken's Rebel Field Guide.[1]
Appearances
"Slaying Dragons" — Star Wars Adventure Journal 9 (reprinted in Tales from the Empire and Hyperspace: The Official Star Wars Fan Club) (First mentioned)