Complex sentence: They had some success during their patrols, and anti-submarine Fairey Swordfish flying from their decks sank and damaged some German U-boats and their fighters succeeded in shooting down German long-range reconnaissance aircraft.
Split into simpler sentences: They had some success during their patrols, and anti-submarine Fairey Swordfish flying from their decks sank and damaged some German U-boats. Their fighters succeeded in shooting down German long-range reconnaissance aircraft.