If you plan on traveling outside of the US (living in Cocoa Beach you will probably be looking at the Bahamas minimal), then get an FCC MMSI if the one you have is Boat US.
In fact, just ignore the Boat US MMSI if that is what you have, get an FCC one and have the AIS AND radios changed to that.
As mentioned you may have to send the AIS and radios off. But, as Ted stated, many manufacturer authorized electronics techs have the authorization from the manufacturers to make the change - mine's does.
I am responsible for what I write, I am not responsible for what you understand.