Lake Superior Shipwreck Map We’re delighted to present these attractive, fascinating and historically accurate shipwreck posters, available for all five Great Lakes plus the Outer Banks of North Carolina. A double-ink printing creates a dark navy blue on white paper. For those intrigued by shipwrecks or Great Lakes history, these posters offer concise information about when, where and what. "Portholes of history" and insights, facts and figures. 24" x 30", rolled in a tube.