What was the major naval advancement involving aircraft carriers developed in WWII?

The major naval advancement involving aircraft carriers developed during World War II was the introduction of angled flight decks. This innovative design allowed aircraft to take off and land more safely and efficiently. The angled flight deck enabled simultaneous operations, meaning that while one aircraft was landing, another could be preparing for takeoff without interrupting ongoing flight operations. This improvement significantly increased the operational capabilities of aircraft carriers, allowing them to deploy and recover aircraft more quickly and effectively in combat situations.

This advancement also facilitated the handling of aircraft on the deck, reducing the risk of collisions and increasing the overall safety of operations. Angled flight decks became a standard feature on modern aircraft carriers following their successful implementation in WWII, demonstrating their importance in naval aviation history.

The other options, while they represent significant technological advancements in their own right, were not developed specifically for or prominently used in World War II aircraft carrier operations.