I wish to implement a system that would allow my boat to communicate with the camp on land.
Currently we have ICOM IC-M25 (5W) handheld radios that work well but do not provide enough range. I am looking for a system that would be able to communicate with the boat when it is a maximum of 12km away.
Our land camp has a hill behind it with an elevation of 30m. My question is if I can put an antenna on the hill with a more powerful radio would I be able to have two way communication with the IC-M25 on the boat at 12km. If so what radio and antenna should I look at purchasing?
Or if not, would I need to install a more powerful radio with antenna on the boat as well? And once again what would suffice?