Hi all,
T TK XFRD means that some time before the airplane estimates it will land (based on the entries in the FMS), all the fuel from the tail (trim) tank is transfrerred forward into the inner tanks. As long as any transfer takes places it is T TK XFR. The trim tank is used in flight to control the CG, to provide an optimum CG for lowest fuel burn.
TERR ON ND is indeed the switch to display critical terrain info on the ND. It shows green for terrain lower than you, and yellow and red (or a little brownish actually) for terrain higher.
Anti skid is controlled by two computers. Resetting the A/SKID makes the other one take over, so if your antiskid fails, you can try if the other computer might work.
"No Active ATC" is shown on the display of the FANS-interface. It is a datalink based pilot-controller communication tool, which is mainly used over the Atlantic, although Maastricht is experimenting as well and there are some other areas (the silk route L888 among others). It makes ATC possible where there normally is a difficult/ hard to read radio connection (anyone who has used HF/Selcal knows what I mean). Also it provides an automatic position report, so voice pos. reports are not necessary anymore.
FANS stands for Future Air Navigation System. The protocol is called CPDLC (that's also what we tell the controller i.e. "Gander, this is XX, CPDLC, Shanwick next"). CPDLC stands for Controller Pilot DataLink Computer (or was the last C Connection, I always forget).
Hope this helps,
Regards,
P77
While I was typing White Knight posted his comment... so the C stands for Connection :-) I never stop learning!