I just embedded a clearer, 720p resolution video of the race in the article above.
Below is a short clip of another day recently scooter free diving on the wreck of the Copenhagen in better visibility.
This question was presented in the article above. I have never seen a good image of the Copenhagen while it was still afloat. There was just the partial image of the grounded vessel, see below.
http://www.nps.gov/
It is possible she resembled the "Glenmoor", see below. It was also constructed by Sir John Priest at the Sunderland shipyard six years later with a similar length and tonnage. This vessel resembles aspects of the artist rendering of the Copenhagen. Input?
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