Korolev received vocational training in carpentry and in various academics at the Odessa Building Trades School (Stroyprofshkola No. 1). Enjoyment of a 1913 air show inspired interest in aeronautical engineering. Korolev began designing a glider as a diversion while studying for his graduation exams at the vocational school. He made an independent study of flight theory, and worked in the local glider club. A detachment of military seaplanes had been stationed in Odessa, and Korolev took a keen interest in their operations.