Keywords: USS R-6 (SS 83) testing snorkel.jpg en wikipedia 2012 July 15 R-6 SS-83 United States Navy submarine testing the first experimental U S Navy submarine snorkel in 1945 http //www navsource org/archives/08/08083 htm 1945 U S Navy photograph PD-USGov-Military-Navy Original upload log en wikipedia USS+R-6+ 28SS+83 29+testing+snorkel jpg 2009-11-29 01 39 Mdnavman 2100×962× 234128 bytes <nowiki> United States Navy submarine R-6 SS-83 testing the first U S Navy submarine exexperimental snorkel in 1945 http //www navsource org/archives/08/08083 htm 1945 </nowiki> __NOTOC__ Ships built in 1919 1919 disasters 1919 in transport 1921 disasters 1921 in transport Ships built in Massachusetts Naval ships of the United States Submarine accidents World War II submarines of the United States Submarine snorkels |