Saturday Night Simplex #1

Saturday Night the amateur radio emergency management folks got together to practice communication on the "2 meter band" (frequency: about 145 Mhz ). Simplex means that we transmit and receive on the same radio frequency.
Reading between the lines, that means that there is no technology between the two radio users. No repeaters or ways to boost a signal. Just two radio users with a clear line of sight to each other.
So, a couple of us went out to find "high ground" from which we could communicate with many "hams". In the photo, you can see one of many ridges in Tulsa where you can have a good time playing "walkie talkies".