   {|    |} the barbel class of submarines (affectionately known in the united states navy's submarine force as the 'b-girls'), the last diesel-electric propelled attack submarines built by the united states navy, incorporated numerous, radical engineering improvements over previous classes. they were the first production warships built with the teardrop-shape hull first tested on albacore (ss-569), and the first to use an "attack center" within the hull rather than a conning tower in the sail. this class o
Cold_War_submarines_of_the_United_States Submarine_classes Vietnam_War_submarines_of_the_United_States