Complex sentence: During the second deployment by "Vindex" her aircraft had flown over 400 in 13 days, but the stain on the aircrews began to show and only 35 per cent of the original Swordfish crews were still with the ship when they returned to port.
Split into simpler sentences: During the second deployment by "Vindex" her aircraft flew over 400 sorties in 13 days. The strain on the aircrews began to show and only 35 per cent of the original Swordfish crews were still with the ship when they returned to port.