Nautical chart of the Black Sea from the Bosphorus to Kerempe Burnu, at a scale of 1:400,000. From the Russian Survey of 1834 and from a survey by Commander W.J.L Wharton,1872-80, with additions and corrections to 1949. Not current - not to be used for navigation!
<bdi><a href="https://en.wikipedia.org/wiki/en:United_Kingdom_Hydrographic_Office" class="extiw" title="w:en:United Kingdom Hydrographic Office"><span title="UK government agency concerned with providing hydrographic and marine geospatial data">United Kingdom Hydrographic Office</span></a>
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1854-01-16
Scan of original Admiralty Chart