I suppose a wreck becomes interesting when someone becomes interested in it! That may sound like a flippant answer, but ask anyone what they think is the most interesting shipwreck in the world and the possibilities are endless. While we do know about many sites from archival records, there is always lots of learn about a site from visiting it. Even if you just better understand how a wreck is eroding, that adds to the knowledge we have on preservation in situ of sites.
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