Keywords: USS R-21 (SS-98).jpg en wikipedia 2012 July 15 R-21 SS-98 United States Navy submarine under construction at Lake Torpedo Boat Company at Bridgeport Connecticut five days after she was launched http //www navsource org/archives/08/08098 htm 1918-07-15 U S navy photograph PD-USGov-Military-Navy Original upload log en wikipedia USS+R-21+ 28SS-98 29 jpg 2009-11-29 03 27 Mdnavman 1000×791× 65859 bytes <nowiki> United States Navy submarine R-21 SS-98 under construction at Lake Torpedo Boat Company at Bridgeport Connecticut five days after she was Ship naming and launching la</nowiki> __NOTOC__ Ships built in 1918 Ships built in Connecticut Naval ships of the United States Submarines of the United States |