Rubuta ci gaba don wannan sakin layi - A farkon shekarun 1920, Yarjejeniyar Naval na Washington ta sanya iyaka ga girman girman da yawan adadin jiragen ruwa na manyan jiragen ruwa guda biyar. Yarjejeniyar da ta biyo baya ta ci gaba da kiyaye waɗannan tanadi. A sakamakon haka, gina tsakanin yakin duniya ya kasance bai isa ya sadu da bukatun aiki ga masu sufurin jiragen sama ba yayin da yakin duniya na biyu ya fadada daga Turai. Ƙananan jiragen ruwa na jiragen ruwa sun kasance a lokaci guda don jigilar jiragen sama zuwa wurare masu nisa, tallafawa hare-haren amphibious, bayar da horo na jirgin sama don maye gurbin matukan jirgi, gudanar da fashewar jiragen ruwa, da kuma samar da tsaro na tsaro ga jiragen ruwa da jiragen ruwa. Bukatun da aka ambata a sama sun iyakance amfani da damar da ke da damar kai hare-haren da aka nuna a yakin Taranto
da kuma harin da aka kai kan Pearl Harbor. Sauyawa na jiragen ruwa na yanzu (da kuma jirgi da aka gina don wasu dalilai) ya ba da karin jiragen sama har sai sabon gini ya kasance.