John Philip Holland
"U-6" was built as part of a plan by the Austro-Hungarian Navy to competitively evaluate foreign submarine designs from Simon Lake, Germaniawerft, and John Philip Holland. The Austro-Hungarian Navy authorized the construction of "U-6" (and sister ship, "U-5") in 1906 by Whitehead &amp; Co. of Fiume. The boat was designed by American John Philip Holland and licensed by Holland and his company, Electric Boat. "U-6" was laid down on 21 February 1908 in the United States, partially assembled, and shipped to Whitehead's for final assembly, a process which, author Edwin Sieche notes, "caused a lot of trouble". She was launched at Fiume on 12 June 1909.