The ship is unloading.

该船正在卸货。

《新英汉大辞典》

A large cargo ship, after unloading, encountered a horrible storm at sea.

一艘大型货船卸货后返航，在海上突然遇到了可怕的风暴。

youdao

Mainly used in oil fields, oil depot, ports, docks, ship big flow like oil, oil unloading!

主要用于油田、油库、港口、码头、船舶等大流量输油，卸油！

youdao

Down at the docks in Rotterdam, the largest port in Europe, cranes swing into action, unloading "Edith" - the world's biggest container ship, which has just come into the port.

BBC: Dutch show growing annoyance with EU