20 mm Oerlikon cannons aboard the U.S. Navy light cruiser USS <i>Biloxi</i> (CL-80) firing during the Second World War.
U.S. Navy
U.S. Navy photo <a rel="nofollow" class="external autonumber" href="http://www.navysite.de/cruisebooks/cl80-45/028.htm">[1]</a> from the <a rel="nofollow" class="external text" href="http://www.navysite.de/cruisebooks/cl80-45/index_003.htm">USS <i>Biloxi</i> (CL-80) 1943-1945 cruise book</a> available at <a rel="nofollow" class="external text" href="http://navysite.de/cruisebooks/index.html">Navysite.de</a>