Most of the time, a fisherman’s boat radio cannot talk to an airplane’s radio, or a standard business radio you’d find on a retail worker’s belt clip.
They are all separated by the operating frequency and something that is commonly known in the radio industry as the Common Air Interface (CAI). CAI separates radios of different protocols; however, Icom has a product that can successfully link these protocols on different frequencies together, the VE-PG4. With a purpose-built cable, connect up to four radios in the back of the VE-PG4 to eliminate CAI, and allow seamless interconnection.











































