What would happen if you were to have no signal on the channel that is overriding the US feed? Like if you were missing either left or right polarization for some reason. Is the receiver smart enough to go back to the US feed? I assume not.
I have noticed that the Global Maritimes simsubs don't seem to start on time either. I've done some investigating, and pulling the plug does remove the simsub for a variable amount of time. Once the receiver reboots getting into the diagnostic menu (diagnostic E1 I think) and pressing info will temporarily prevent the guide for reloading, and the simsub stays away for about 5 minutes.