Добрый день!
>это к старому спору - относится ли "landed on" (Ванингтонский договор) к приему гидросамолетов.
А там прямо указано на два типа авианосцев: с полетной палубой и без.
The category of aircraft-carrier is divided into two sub-categories as follows:
(a) Vessels fitted with a flight deck, from which aircraft can take off, or on which aircraft can land from the air;
(b) Vessels not fitted with a flight deck as described in (a) above.