Why not ask if you need a transport to cross the Tasman sea. Heck, people can swim the English Channel so therefore no transport should be required, right?
Fair dinkum. This has got to be one of the weirdest A&A questions I’ve heard.
If you are attacking a lone enemy transport with a plane in let’s say SZ 1, are any of your own naval units allowed to move through SZ 1 during Combat Movement?
yes, you can ignore unescorted trns in combat movement. battles occur after combat movement.
JimmyHat is correct.
so in the same scenario, with a sub as defender, instead of the transporter (attacking with a destroyer) would the attacker still be allowed to sail through with other ships (combat move)?
Yes, as the sea zone is still not hostile.