Keywords: USS R-21 (SS-98) starboard view.jpg en wikipedia 2012 July 15 R-21 SS-98 United States Navy submarine http //www navsource org/archives/08/08098 htm 1919 1924 U S Navy photograph PD-USGov-Military-Navy Original upload log en wikipedia USS+R-21+ 28SS-98 29+starboard+view jpg 2009-11-29 03 30 Mdnavman 900×720× 54036 bytes <nowiki> United States Navy submarine R-21 SS-98 http //www navsource org/archives/08/08098 htm Sometime between 1919 and 1924 U S Navy photograph Permissi</nowiki> Ships built in 1918 Ships built in Connecticut Naval ships of the United States Submarines of the United States |