The 'Modern' is open to interpretation, as it is based in suggestions by members. But I'd guess that from 1980 onwards would be a good start point, and in my view, any military aircraft would be eligible, fixed or rotary wing. What do others think?
As for the 'Carrier' GB, I think it would be good to have this from any era, since carriers first evolved, and again, fixed or rotary wing would provide a wide spectrum of subjects.