Well, are you talking about Convoy centres or convoy routes? If you mean Convoy centres then they aren’t really Australian, they’re british and you divide the money between India and Australia how you see fit when you collect it. If you mean convoy routes then the income from the island or territory it is adjacent to is subtracted from the appropriate country’s income. You can learn all about both centres and routes on p. 22. happy playing.
the manual says that you can’t take over convoy centers or routes during non combat movement. Does this mean you can’t take over the Alaskan convoy by just moving your Japanese carriers into the space? You have to engage the american fleet with the carriers in order to take it over? I guess it doesn’t matter too much anyway, the Americans will get back the lost ipcs from the Alaskan convoy.
You just gotta move it in on the combat phase. It’s like taking an empty enemy terrotory.