Is a Destroyer allowed to ignore a Sub?
Cant remember sorry
Germany attacks GB’s Cruiser in SZ 91 with 2 Subs, Is GB allowed to scramble the Gibraltar Fighter?
No because there is no GB destroyer to see the subs
GB amphibious attacks Denmark, 2 German Subs in SZ 112, Germany scrambles 3 Fighters from W. Germany, are the Subs in battle too?
Yes all sea battles must be resolved before amphibious assault. The scrambled fighters may not participate in the land battle though as they were scrambled.
Japanese Destroyer doesn’t hinder a ANZAC Transporter from dropping off units when they are not at war, right?
Correct
Can US and Japanese Ships share a SZ when not at war?
In the Alpha rules the U.S in the Pacific can only end naval movements in sea zones that are not adjacent to Japanese-controlled territories and islands. So yes they can share sea zones with Japanese units as long as there are no Japanese islands or territories with that sea zone.