Its an obstacle course we set up around the station with different fireground activities you would do. i.e swinging an ax, climb ladder, drag dummy, drag 200' 2 1/2" hose while wearing full turnout with scba. There are like ten things you have to do and you keep going until you run out of air. If you cant keep going, you sit in the meeting room but must leave scba on until you use up all the air. If your good, You can usually make it through twice before you run out of air.