The secret war fought by US Navy's most capable hunter-killer submarine - NZ Herald
Why did US Navy sub return to port with a pirate flag?
Jolly Roger - Wikipedia
The Jolly Roger Flag - A Symbol of Pirates and Nazi-Hunters
US submarine returns to port flying pirate flag
USS Nautilus (1954) - naval encyclopedia
Cornered at the Bottom of the East China Sea Naval History Magazine - December 2009 Volume 23, Number 6
US submarine returns to port flying pirate flag
Mystery of U.S. nuclear submarine flying pirate flag now solved
Approaching the Ship - USS KIDD
Flag Sizes
Submariners: underhanded, unfair, and damned un-English? - Pacific Navy News : Pacific Navy News