Courageous was especially vulnerable because her large-light-cruiser origins provided neither the subdivision nor torpedo defense of an Admiral-class hull. A larger conversion might survive the U-boat attack that sank her, but that durability would not make submarine hunting a sensible use of such a valuable ship. A repeatable 10,000-ton Hermes-style cruiser carrier would instead handle convoy escort and anti-submarine work, leaving the fleet carriers for tasks that needed their speed and air groups. Under the early treaty definition, a ship below 10,000 tons did not count as a carrier, so a joking proposal declares a new design at 9,999 tons even though historical Hermes missed the threshold by about 500 tons. A series of such small carriers could also cover enough support work to make a separate Unicorn-style maintenance carrier less necessary. The Glorious scenario changes because a larger air group could carry rescued RAF aircraft without surrendering the ability to maintain a defensive patrol. With ample aircraft and a senior flag staff aboard, the absence of combat air patrol would be much harder to excuse.
Notable Point · 45:18-49:54
Survivable fleet carriers and smaller ASW escorts
Replacing Courageous and Glorious with larger Admiral conversions changes both the damage the fleet carriers might survive and which ships should accept convoy and submarine-hunting risk.