Helicopters reorder carrier fleets and escort forces

The hangar problem affects every carrier navy: higher hangars would worsen existing top-weight problems in some Japanese designs, while Béarn's unusually tall upper hangar is a rare existing space that remains useful. Tone-class aviation cruisers become plausible helicopter cruisers, although their shorter range creates a tradeoff with seaplane reconnaissance. At convoy scale, sixteen helicopters backed by a few surface escorts can maintain airborne patrols and repeated attacks, reducing the number of traditional ships needed to hold a contact. Older British carriers are especially vulnerable because Argus, Furious, Courageous, Glorious, and Hermes cannot easily accept the taller aircraft. Replacing them sooner could bring the Illustrious and Implacable programs forward or collapse them into one larger standard design. Simple merchant conversions also provide helicopter escort carriers more readily than fixed-wing equivalents because they need only a supported landing area, hangar, stores, and accommodation rather than a full-length flight deck.