Wacco,
I have a mate thats a captain on the Chats metro.
They are using ZK-CIC on the CH-AK-CH night freight run.
Off memory once posted on the Metro/ Convair flight crew are stuck there for a while, well thats what i've seen with my experience. Convair crew are usually based in CHT, while Metro crew are AKL based.
Hope it helps
Moe