It's if you drop alt. have turns over a certain amount of *'s and if there is turbulence. I find this to be a very useful system but how do the pilots know if it's on or off. I know that when it goes on or off about 1-3min after the pilot comes on "Ladies and Gents, the seatbelt sign has been turned on, it seems as though we are going into some choppy stuff so we're going to ask you all to return to your seats, thanks again" or "Ladies and Gents, at this time we have reached our cruising altitude and have turned off the seatbelt sign, even though this sign is off we ask you for both your own safety and for the safety of the crew that when you are in your seats that you keep your belt fastened. Thanks again and I'll be back on when we start our decent into XXX, thanks again and welcome aboard" If they know when to say this is there something that is on the LCD
's that will say if it's on or not?