In a message dated 19/12/2004 11:50:01 GMT Standard Time, bones@xxxxxxx writes: Yep - that is an FS value that can be trapped in XML. It would read the same value as shown in the top display using SHIFT + Z. Basically XML is flexible enough to create a gauge showing almost any FS parameter you want. Some examples at random are: TURN COORDINATOR BALL SIM ON GROUND GROUND ALTITUDE DELTA HEADING RATE GYRO DRIFT ERROR PLANE HEADING DEGREES GYRO WISKEY COMPASS INDICATION DEGREES MAGVAR TOTAL WEIGHT DECISION HEIGHT RADIO HEIGHT AIRCRAFT WIND Z AIRCRAFT WIND Y AIRCRAFT WIND X STANDARD ATM TEMPERATURE TOTAL AIR TEMPERATURE SEA LEVEL PRESSURE BAROMETER PRESSURE AMBIENT WIND Z AMBIENT WIND Y AMBIENT WIND X AMBIENT WIND DIRECTION AMBIENT WIND VELOCITY AMBIENT PRESSURE AMBIENT TEMPERATURE AMBIENT DENSITY and so it goes on. These "A:Vars" run to 920 separate variables! What you do with the variable is up to you. They can be displayed as simple text or you can (if up to it) design a proper gauge to show the result. bones Hi Bones, Is this a good subject for one of your excellent tutorials? Sounds like we could use this info. as the basis for some useful guages, even if they just appear as text. Frank T.