It's a great scanner for Military Air and VHF AIr. Range would depend on antenna setup. I can hear aircraft well over 100 miles away. I have a DPD 118-1000 Log Periodic fed to my scanners with LMR400 coax. It's on the roof pointed north to the Nellis AFB ranges. This week there was a crash near Alamo, NV. I could hear the wingman circling the crash. Easy 100 miles away loud and clear. Your results may vary depending on mountains and terrain. I like the 15x over the 15 because of memory size and the few differences they added. You can find opinions all over this website about which one is better, I also have a GRE PSR500. I can say for digital systems it's great too but the Uniden 15x does better on Mil air for me.what are some thought's on the bct15x as a milair scanner. also for the vhf aero. range ?. thank you all in advance.