Mode S transponders
 

Hi there,

I'm planning on a IFR private flight from Copenhagen down towards Basita airport, Corsica. The route I've chosen leads me down through Poland to Prague, then further down to Trieste in northern Italy. The plane is a light aircraft.

The question is, since Bastia Airport is in Marseilles FIR, do I need a Mode S Transponder. I've searched and spoken to (almost) every person who could know this kind.

Thanks in advance,

Martin