▁up ▁ 1 7 5 6 ▁ ▁Br istol ▁class ▁– ▁Non - Est ab lish ment ▁ 5 0 - gun ▁ships ▁( length ened ▁by ▁ 6 ▁feet ) ▁ ▁Br istol ▁( 1 7 4 6 ) ▁– ▁broken ▁up ▁ 1 7 6 8 ▁ ▁Ro chester ▁( 1 7 4 9 ) ▁– ▁sold ▁ 1 7 7 0 ▁▁ 1 7 4 5 ▁Est ab lish ment ▁ ▁First ▁rates ▁of ▁ 1 0 0 ▁guns ▁Royal ▁George ▁ 1 0 0 ▁( 1 7 5 6 ) ▁– ▁found ered ▁ 1 7 8 2 ▁▁ ▁Britann ia ▁ 1 0 0 ▁( 1 7 6 2 ) ▁– ▁renamed ▁Princess ▁Royal ▁ 1 8 1 0 , ▁St ▁George ▁ 1 8 1 2 , ▁St ▁Bar f leur ▁ 1 8 1 9 , ▁broken ▁up ▁ 1 8 2 5 ▁ ▁Second ▁rates ▁of ▁ 9 0 ▁guns None ▁built ▁ ▁Third ▁rates ▁of ▁ 8 0 ▁guns ▁Princess ▁Am elia ▁ 8 0 ▁( 1 7 5 7 ) ▁– ▁l ent ▁to ▁custom s ▁ 1 7 8 8 , ▁sold ▁ 1 8 1 8 ▁ ▁Third ▁rates ▁of ▁ 7 0 ▁guns ▁V angu ard ▁ 7 0 ▁( 1 7 4 8 ) ▁– ▁sold ▁ 1 7 7 4 ▁ ▁Som erset ▁ 7 0 ▁( 1 7 4 8 ) ▁– ▁w reck ed ▁ 1 7 7 8 ▁ ▁Or ford ▁ 7 0 ▁(