Chyetverikov SPL
The SPL (Samolyet dlya Podvodnikh Lodok – aeroplane for submarine boats) (a.k.a. OSGA-101, and Gidro-1) was a submarine borne flying boat designed and built in the USSR from 1931.
The SPL (Samolyet dlya Podvodnikh Lodok – aeroplane for submarine boats) (a.k.a. OSGA-101, and Gidro-1) was a submarine borne flying boat designed and built in the USSR from 1931.
The SPL (Samolyet dlya Podvodnikh Lodok – aeroplane for submarine boats) (a.k.a. OSGA-101, and Gidro-1) was a submarine borne flying boat designed and built in the USSR from 1931.
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