G'Day Stephen,
Port Alma is known for Ammonium Nitrate (explosives) and tallow exports and a small amount of petroleum imports. It's a very small, shallow port in the middle of nowhere near Rockhampton. What's in the containers ??
I posted an aerial shot a few years ago, luckily flying high enough to escape the sandflies that infest the place . . .
Cheers,
tropic