Gigantic 10-story tall ships that stretch three football fields long line the wharf at the Port of Oakland. There’s constant movement as big white cranes load and unload colorful shipping containers on and off the boats. Most of the ships look pretty much the same, equipped with lifeboats, pulley systems and flags hoisted on the decks. But one vessel has something different: two thick cables, which look like over-sized extension cords, that hang off the side of the boat and connect to the dock.

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