Royal Navy carrier defense did not rely on armor and antiaircraft fire instead of fighters. British doctrine helped develop naval combat air patrol and used two-seat fighters so observers could detect incoming aircraft when radar was limited. Those practices worked alongside the Navy's development of air-warning radar.
Notable Point · 2:59:54-3:02:16
Why armored British carriers still depended on fighters
Armored flight decks complemented rather than replaced combat air patrol, radar warning, and observer-assisted fighter interception.