Basic Enlisted Submarine School (BESS) Test 2 Practice 2026 – Comprehensive All-in-One Exam Success Guide!

High-pressure air is stored in air banks. These are dedicated vessels that hold large volumes of compressed air at very high pressure, ready to be used for ballasting operations (blowing ballast tanks) and other pneumatic needs. The ballast tanks themselves are water-filled and not storage for air. The service air system distributes air at usable pressures to equipment, relying on the air banks or compressors for the supply. The low-pressure air compressor generates air at lower pressures to feed the service system and help refill the air banks, but it is not the storage itself.