428-GX-K93361:  Hydrofoil patrol gunboat USS Flagstaff (PGH-1) with foils partly lowered, 10 March 1972.  NHHC Photograph Collection, Naval Subjects, Ships.
<a rel="nofollow" class="external text" href="https://www.flickr.com/people/127906254@N06">National Museum of the U.S. Navy</a>
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