"A distinct feature of general cargo ships is that they normally have their own gear, which means that these versatile ships can trade to smaller ports and terminals that do not have shoreside loading and unloading equipment. And while these ships are often employed with abnormal loads that other ships could not accommodate, in lean times general cargo ships can easily turn their hand to carrying containers, bulk or bagged cargo."
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General cargo ships can hold containers and they have their own cranes.