Yup Perry - it's a remarkable thing although to be fair the WT were quoting another secular source. The irony is that the quote casts doubt on the figures of the size of the Ark and no one picked it up. They did the same when they mentioned in the Insight Book that one of the oldest pyramids in Egypt dated from before the flood.
You don't need any of this discussion about the ark to debunk the biblical flood however. Geology, physics, ice cores, anthropology, archaeology will do a pretty good job of it for you as a start.