Reads like the LFT-Script i had lying around <img src="wink.gif" border="0"> . .I just want to know which of the datalink possibilities are in use right know, what the mode-s transponder we use can do. I know there should be more use of the downlink feature to atc in the future (like MCP-altitude, tas, gs, rates, wind-data etc, identification without squawk) but do the airlines have to buy new boxes or ours capable of doing all that already?