Complex sentence: The Soviet Navy ordered 120 "Orlyonok"-class "ekranoplans", but this figure was later reduced to fewer than thirty vehicles, with planned deployment mainly in the Black Sea and Baltic Sea fleets.
Split into simpler sentences: The Soviet Navy ordered 120 "Orlyonok"-class "ekranoplans". But this figure was later reduced to fewer than thirty vehicles, with planned deployment mainly in the Black Sea and Baltic Sea fleets.