I spend a lot of time doing repairs at the Port of Oakland, usually on Saturday when the cranes aren't running. Spent all winter down there after Loma Prieta in '89, first work was repairing one of the crane rails, the cranes run on two with a huge umbilical coil. In this yard, one of the rails was on the dock, which was constructed on pilings and didn't move, but the inboard rail was off the dock in the paved area, which sunk a foot during the quake. There were three new cranes already on the water from Korea, and they were looking at massive surcharges if unloading was held up- we made the deadline. And yeah, the cranes were sideways on the ship, they waited until the tide was right, and the cranes just walk off the ship on temp rails and power- quite a thing to watch.
You can tell when the crane operator gets a little rummy near end of shift, sometimes they will miss the pins on the yard dog trailer, pick the container up about 4 feet, and drop it down hard- poor bastage in the yard dog goes for a pretty good ride when it bottoms out