I believe three hours is how long it stays in the system, but remember that it is a report at a given time. Its not a forecast so you can only take it for what it is. Also LewisU_pilot I have a couple questions for you if you don't mine. I'm thinking of applying to instruct there, and was wondering what type of aircraft do you have? How many airplanes approx.? and How many students are there, and do you know how many students most instructors have a semester? Any information you can provide would be helpful.