Exactly as in full-size practice trains are offered and accepted between signal boxes by the use of Block instruments. Hardwick is configured as a Midland box, Everglades is configured as a Southern box. Because of the complication of the area it controls, and there may be as many as six trains on the track diagram at once, Everglades Junction box is also equipped with a train describer to assist the signalmen, usually two on duty together, in keeping track of movements. The train describer is also of great use in logging locomotive activity over the course of a season, and calculating average route miles.