Knoll <a href="https://en.wikipedia.org/wiki/Cardinal_mark" class="extiw" title="en:Cardinal mark">North Cardinal</a> mark, <a href="https://en.wikipedia.org/wiki/Thames_Estuary" class="extiw" title="en:Thames Estuary">Thames Estuary</a>.
Photographed by James Gray, 11th August 2005
The original uploader was <a href="https://en.wikipedia.org/wiki/User:Canthusus" class="extiw" title="wikipedia:User:Canthusus">Canthusus</a> at <a href="https://en.wikipedia.org/wiki/" class="extiw" title="wikipedia:">English Wikipedia</a>.
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