The closing prompt defines a modern frigate as a lighter general-purpose warship with a primary anti-submarine focus, then asks viewers to find fictional equivalents.
Judging carriers commissioned by 1940 requires distinguishing unavoidable experimentation from choices that ignored available evidence or basic operational logic.
Argus and Langley show both the value and limits of first-generation flush-deck conversions, including bridge placement, training value, and room for later supporting roles.
The first purpose-built carriers expose the importance of tall funnels, clean airflow, island structures, and designing a small carrier around a coherent cruiser-support mission.
Tiger's battlecruiser hull offered more room for modifications than Iron Duke, making her the more adaptable gunnery training ship in this counterfactual.
Furious's lower flying-off deck anticipated simultaneous launch and recovery but sacrificed hangar and flight-deck capacity as aircraft rapidly grew beyond its dimensions.
Early carriers relied on wind over the deck for takeoff, while lengthwise wires kept light aircraft from sliding sideways rather than braking them after landing.
Béarn combined three differently sized lifts, clamshell flight-deck covers, and cycle times of roughly three to five minutes into an operational bottleneck.
Béarn's upper hangar was about 6.5 meters high, but the forward section lost roughly 1.5 meters to aviation accommodation despite ample space elsewhere.
Béarn supported aircraft weapons alongside five shipboard armament families, including 6.1-inch guns and torpedo tubes whose tactical value did not justify their logistic burden.
Béarn's combination of turbines and triple-expansion engines delivered range but limited the carrier to about 21.5 knots when deck wind was vital to early aircraft.
Béarn could serve as a useful experiment only if France used the lessons to replace her; leaving the ship in service preserved the compromises instead.
The lower fighter flying-off deck consumed valuable space even as Royal Navy doctrine shifted toward continuous patrols and sustained operations rather than last-minute visual interception.
Archival clues suggest the Royal Navy may have considered converting Admiral-class hulls alongside Courageous and Glorious, although the evidence remains circumstantial.
The early losses removed both operational flight decks and experienced carrier personnel who could have strengthened British operations in the Atlantic and Mediterranean.
Both systems launched aircraft below the main flight deck, but US hangar catapults sacrificed less permanent ship volume than the Courageous-class flying-off opening.
Both carriers entered the Second World War with their lower flying-off openings intact; unlike Japanese conversions, neither received a continuous single-deck rebuild.
At more than 65,000 tons, a Queen Elizabeth-class ship would be a super-fleet carrier by Second World War standards and could hold roughly ninety period aircraft.
Britain had developed a sophisticated multi-carrier doctrine, but wartime demands dispersed too few carriers across many theaters and forced them to operate alone.
Fast twin-engine piston aircraft such as naval Mosquito or Sea Hornet developments could have justified angled-deck thinking before jets became dominant.
Eight-inch gun turrets consumed displacement, crew, and flight-deck space for a surface engagement that the fast Lexington-class carriers should have avoided.
American doctrine emphasized a decisive full-air-group strike, while Britain developed continuous cycles and long-range night attacks that shaped the Swordfish's unusual strengths.
The Lexingtons hold the daytime advantage through larger air groups, but British night-strike training could reverse the result if contact came near dusk.
Both navies tried to maximize aircraft under tight tonnage limits, producing light carriers whose structure and survivability restricted frontline use.
A roughly 24,000-ton Ark Royal design could have added an armored flight deck and stronger torpedo defense while retaining speed and a large air group.
The armored flight deck wins this forced choice because it guarantees carrier resilience, while a naval Spitfire would still compete with the RAF for scarce Merlin engines.
Large Admiral-class conversions could have raised carrier prestige, altered treaty tonnage assumptions, and given later British designs a larger armored-carrier baseline.
The Yorktown class achieved an excellent war record despite a light flight-deck structure and treaty-driven weight savings that restricted protection and wartime growth.
Hiryū's port island was paired with starboard exhaust trunking inherited from Sōryū, adding internal complication without creating a true mirror-image carrier.
Wasp packed fleet-carrier aviation into about 14,900 tons, but structural and protective sacrifices made the ship too vulnerable for the role claimed for her.
Open mounts save topweight and let crews escape accidents, while enclosed mounts help only when they provide meaningful armor rather than a thin splinter box.
Treaty limits forced an artificial choice between protection and air-group size, while Britain's expected operating areas made surviving land-based air attack especially important.