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What is the aft draft (low in water or high in water)? Cooling Water overboards are generally under the waterline unless vessel is in light ballast or deballasted.

Generators are typically not designated for a specific purpose, though some vessels do have dedicated generators for the unloading system or bow thruster. The electricity generated goes to the main switchboard where it is divided to each consumer (ship's hotel load, machinery, cargo system, etc).

I have a picture of the Speer unloading in Conneaut, stern view. There are 3 Gen Sets running as evidenced by the cooling water exiting the stern of the vessel. One Gen Set is operating the unloading system, one is providing electricity to the vessel, what would the third Gen Set be operating ?