Afternoon Bombah.
A transport has one move, either in the Combat phase, if landing amphibiously, or in Noncombat, if reinforcing or converting a Friendly Neutral.
A transport can pick up from up to two territories, but can only unload into one. Once it has unloaded, its turn is over. It does not get another go.
The loading and unloading are part of its one go.
While not at war, On the Pacific side an American naval unit can move anywhere on the map, but it cannot end its move in a SZ containing a Japanese territory.