Complex sentence: This feature greatly reduced the acoustic signature produced by the boat while cruising, the submarines are also packed with technology generally found only on nuclear-power submarines and are still widely regarded as being among the best diesel-electric submarines in the world.
Split into simpler sentences: This feature greatly reduced the acoustic signature produced by the boat while cruising. The submarines are also packed with technology generally found only on nuclear-powered submarines and are still widely regarded as being among the best diesel-electric submarines in the world.