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Click on the image above to get the actual size (full-resolution). My hard to find SRU-40B/P, HABD or Helicopter Aircrew Breathing Device provides oxygen and assists soldiers in making an emergency egress from a submerged aircraft. It is currently used by USMC force recon, MEU, and helicopter crewmembers. This unit is similar to: HEED Helicopter Emergency Egress Device (milspec) HEED I , HEED II, HEED III HABD Helicopter Aircrew Breathing Device (milspec) SEA Survival Egress Air (milspec) MAS Micra Air System (commercially available) Spare Air System (commercially available) Includes Catalina aluminum tank , Primary Regulator / Valve with Pressure Gauge, 20 inch Low Pressure hose and Secondary Regulator(US Divers Micra) , Mouthpiece Cover. In military service this device is designed to enhance survivability in case of emergency water landing, by providing an alternate air source and allowing aircrew time to escape from submerged aircraft. This device may also be used by commercial or recreational divers as a redundant air supply in case of \"out of air\" emergencies, tank or regulator failures. Details from the Navy Training System Plan: \"SRU-40/P Series Helicopter Aircrew Breathing Device. The SRU-40/P Series HABD is a compact, lightweight breathing assembly with a rated cylinder pressure of 3,000 psi. The SRU-40/P Series HABD is intended for use by helicopter, E-2, and C-2 Aircrew personnel during emergency ditching in water; it is also being evaluated for use in the MV-22. The SRU-40/P Series HABD is a two stage device that comes in one size only. It is a compact, self-contained breathing device consisting of a first stage regulator and a second stage regulator with a 20-inch hose connecting the two regulators. The first stage regulator assembly consists of the first stage regulator subassembly, the pressure gage subassembly, and the cylinder. An indicator ring on the first stage displays on-off status and a safety burst disc in the safety disc subassembly prevents over pressurization. The cylinder has a capacity of 1.5 cubic feet of air at a rated pressure of 3,000psi. The second stage regulator consists of the mouthpiece subassembly and the box bottom, the plastic chamber, and other integral parts. It has two exhaust valves that are covered for protection from becoming unseated, and provide greater security of a negative pressure in the demand chamber.\" Variants of this device are in use by the U.S. Navy, U.S. Marine Corps, U.S. Air Force, U.S. Army aviation units, U.S. Coast Guard as well as Australian military units. The HEED III is in service with the U.S. Customs Service NAVY HELICOPTER AIRCREW HABD SRU 40 B/P \'BAILOUT BOTTLE\' REGULATOR HABD SRU 40 A/P
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