Azores inhabitants. The nine islands that compose the archipelago occupy a surface area of , that includes both the main islands and many islets located in their vicinities. Each of the islands has its own distinct geomorphological characteristics that make them unique: Corvo (the smallest island) is a crater of a major Plinian eruption; Flores (its neighbor on the North American Plate) is a rugged island carved by many valleys and escarpments; Faial characterized for its shield volcano and caldera (Cabeço Gordo); Pico, is the highest point, at , in the Azores and continental Portugal; Graciosa is known for its active
Aviation in the Azores of air-sea bases would close the "Azores Gap", and provide a secure blanket for the North Atlantic. The sudden attack at Pearl Harbour by Imperial Japanese forces resulted in a review of Portuguese guidelines, paralysing the working group. A ship (the Portuguese "Mirandela") shipped 30 Gloster SS37 Gladiators and five Junkers Ju 52 monoplanes, as well as support equipment and personnel, were sent to the Azores (departing on 4 June 1941). Fifteen of the Gloster Gladiators and five Ju 52s were deposited in São Miguel at Air Base 4, for the 1st Expeditionary Fighter Squadron, while the remaining planes were