Easily Jammed.
Also easy to set up against a Jam, with codes and other methods and side band frequencies. As long as both communicating parties know what is going on. Ghost signals to throw off the person trying to jam, trunking, lots of stuff to keep comms up and running.
Edit: I almost forgot the greatest comm in US history, the Code Talkers, a few are still surviving.
Youtube has some great stories and interviews of some of them. A lot of the Code Talkers were Native Oklahomans, Kiowas, Comanches, and others tribal members. Some real Awesome dudes. It is a complete shame they are not Honored more in our American History and Oklahoma History. Very little has been recorded about there sacrifice and contributions' to our Country from the Code Talkers.
You should hear some of the stuff they talked about in there conversations while Code Talking. A lot of it was just visiting with there brothers in Arms to throw off the enemy. No one at the time could decipher there Native Tongues', they would just talk and visit, until there were important messages that needed sent. They talked of their childhood memories back home growing up. It would have been so awesome to have had those conversations recorded in HIstory. Most have passed now, so no one will ever hear them.
Code Talkers were real heroes that many lives.
Amazing when considering how the goobermint punished children for learning and using their language. Many of those languages are now disappearing and efforts being made learn them.
There was a movie, I believe Nicolas Cage, about the Code Talkers and the orders issued against capture.
Eye opening to the workings of our goobermint and military.