The SEED provides an emergency air supply for personnel standing watch or working in all main propulsion and auxiliary machinery spaces on surface ships. This device is not a replacement for the Emergency Escape Breathing Device (EEBD). The SEED is worn on the belt in a holster of the watchstander and can be donned rapidly. It weighs 1.3 pounds, is 8.75 inches long by 2.25 inches in diameter and holds 1.7 standard cubic feet of air at 3,000 pounds per square inch (psi). The SEED provides one and a half to three minutes of air depending on the user’s respiration rate and volume.