All RAF Hercs have a TCAS fit. It will give you TA / RA on anything with a mode C transponder, as will any TCAS / ACAS II fit. FJ do NOT have it fitted, for the simple reason that the very high ROC / ROD commonly encountered in a FJ will give you RAs up the yin-yang, since the system is not designed to cope with it. Does that answer the question?