@firepower:
In Global, if the US wants to move a ship from it’s harbour in SZ 10, through to 11, it matches up in the Atlantic in SZ64 does it not?
See chart on page 32. 11 is adjacent to 64. Yes, you can skate right through the Panama, so if you control Panama and WUS you can indeed go from 10 to 89 in one move.
If that ship; being that it set sail from a sea base, can move three, can it get through to SZ89? I.e. the Panama Canal can just be passed through?
Yes.
Also if two countries were not at war yet, say US and Japan, and the US had a surface ship in a SZ, could Japanese surface ships pass through that zone also, in non-combat, if they ended outside of that SZ?
When you are not yet at war, the other power’s ships are all non-hostile, or treated as “friendly”, so yes.
Lastly, in Chinese controlled Yunnan, there’s a US fighter that starts the game there. Is that controlled by the Chinese? So if the Japanese were to attack that territory, would it constitute a declaration of war with the US?
It just happens to be a US unit because they didn’t make a special piece. It is 100% Chinese. Moves with the Chinese, and is not considered American in any way, so no it has no DOW ramifications for the USA.