▁April ▁ 1 9 4 2 ▁▁ ▁( 1 9 3 8 ), ▁s unk ▁ 1 4 ▁November ▁ 1 9 4 1 ▁after ▁being ▁tor ped o ed ▁by ▁U - 8 1 ▁on ▁ 1 3 ▁November ▁ 1 9 4 1 ▁ ▁Never ▁completed : ▁▁▁▁ ▁E agle   – ▁cancel led ▁ ▁Africa   – ▁ ▁to ▁Mal ta ▁class ▁then ▁cancel led ▁ ▁Maj estic ▁class ▁▁ ▁( 1 9 4 5 )   – ▁was ▁never ▁completed ▁▁▁ ▁Herm es   – ▁cancel led ▁ ▁Ar rog ant   – ▁cancel led ▁ ▁Mon mouth   – ▁cancel led ▁ ▁Poly ph em us   – ▁cancel led ▁ ▁  – ▁cancel led ▁ 1 9 4 6 ▁ ▁Mal ta ▁New ▁Zealand ▁Gib ral tar ▁Africa ▁ ▁C VA - 0 1   – ▁cancel led ▁ 1 9 6 6 ▁Queen ▁Elizabeth ▁Duke ▁of ▁Edinburgh ▁ ▁United ▁States ▁ ▁The ▁United ▁States ▁Navy ▁is ▁a ▁blue - water ▁n avy ▁that ▁is ▁the ▁world ' s ▁largest ▁and ▁most ▁powerful ▁because , ▁among ▁its ▁numerous ▁other ▁vessels , ▁it ▁has ▁the ▁world ' s ▁largest ▁fleet ▁of ▁nuclear ▁power ed ▁aircraft ▁carri ers . ▁The ▁car rier ▁fleet ▁currently ▁compr ises ▁the ▁( CAT OB AR ) ▁ ▁and ▁( CAT OB AR / ▁E MA LS ) ▁ ▁super car riers . ▁These ▁carri ers ▁serve ▁as ▁the ▁center pie ces ▁and ▁flags hips ▁for ▁the ▁Navy ' s ▁Car rier ▁St rike