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Wreno

Minor correction - up to 1/4" ball bearings are fired. And, though the hulls are sheathed with balsa (up to 1/8" thick), the hulls can be made of virtually anything (many are fiberglass or plywood ribs). The damage is thus minor and easily repaired, making it easy to battle again and again. Some ships have been sunk and re-battled as many as 5 times in a day.

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