Here is a example of LOS communications that say Kenwood dual band ht have done with a Arrow dual band beam antenna and the HT only pushing 5 watts. ISS ring a bell to anyone, voice and packet. There is some advantages with amatuer that gmrs don't have.
It is easy for the law to verify your fcc licenses just by doing a records check even thru fcc. The police do have mobile data terminals in there cruisers that can do it.
Problem is because of the way a skidsteer operates, there is only 1 mounting solution which is the roof cab of the skidsteer in which will be hard pressed for anything to survive up there with falling debris. Dozer and Hoes have different operations for which hardly anything goes over the cab. How do I know this? You work for United Rentals long enough and you learn the intricacies of the equipment you deliver and set up.
iIf you have one radio in your left hand hitting the transmit button, and you have 2nd radio in your right hand hoping to here the transmission from your left hand and you don't. The radios are to close and you experienced something called de-sense. The radios are to close to one another. As the song goes "you have to keep them seperated"
Diamond has 2 mounts that are very useful, K400 and K412 in which the K412 has a 3 axis position adjustment and the K400 is 2. I have both and they both work good.
And remember this one important thing. Not all radios are the same. Some like my Moto R7 will try to enhance the received signal with processing to make it clearer if need be. It all depends on the equipment you using at the time.
Amateur radio 23CM 1240mhz to 1300 mhz, it could have been a DSTAR signal which Icom has radios that do dstar in 23cm.
january_2016_spectrum_wall_chart_0.pdf