Georgia Skies is a 135 operator. I can't remember how to get around the 2 engine rule for the scheduled (135) operator, but it's in the regs. somewhere. I think it had to do with 9 or less seats? or something like that. Come to think of it, I believe Cape Air (the 402 operation) is 135 as well. I know they do have a 121 certificate, but I think thats only for the ATR's in Guam.