Originally Posted by Flatballer
Removing ballast from inside the ship and putting it outside would actually raise the gross tonnage, not lower it. There are things you can play with to reduce your tonnage and it's possible they did that for regulatory reasons, but the ballast is unrelated.
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I had read in one of the documents the lead ballast was removed from inside the hull (and placed outside on the keel) to make more interior room for passengers.