I was floating through looking @ the different, Radio Controllers, and I came across this tidbit of information.

74Mhz is for Surface
50MhZ you need a license for
and
72MhZ for Airplanes.


Now, if these numbers are static wouldnt everyone's RC interefere with everyone else's? Or is the difference after the 72?
IE. a 72.56 would be a 56Mhz? and a 72.08 be an 8Mhz?

Can I use say a Futaba tX6A for airplane and sailboat usage? Or do I need a seperate controller?