I was working with a water rescue today on Lake Erie and my FD worked in conjunction with the coast guard. We have an old vhf radio in our squad that has marine 16 and 22 on it which we used to cordinate with USCG. If we had a vhf portable, what channels should we put on for future interoperability? Is 16 and 22 the only ones they pretty much use? Also do they only use VHF or do they have a 700/800 system too?