Hi mate.
I'm a radio ham so know all about antennas and tuning, (i think!)
You'll only really transmit between 2-13Mhz. Oceanic anyway.
The ATU (antenna tuning unit) does all the work for you. As has been posted,when you swith frequencies, just make sure the ATU is pressed before transmitting or else you will appear gobble-de-gook to ATC.!
