Why Are They So Quiet?

The hull is covered in sound-absorbing tiles that reduce sonar reflections. Astute-class submarines use a pump-jet instead of a traditional propeller, significantly reducing noise. The Rolls-Royce PWR2 nuclear reactor doesn’t require refueling for its entire service life, making it quieter and reducing operational risks. Vital components are mounted on rubberized platforms, preventing vibrations from reaching the hull and making the sub even harder to detect.