These DCA are components of the Emergency Egress Hatch Removal Systems installed in the MV-22, CV-22 and HV-22 Aircraft. They are the ballistic signal transmission components of the system. The system is designed to provide emergency egress in a post crash environment on land or water. The Primer-High DCA is used to accept mechanical energy from the initiators and convert it to explosive energy. The High-Low DCA acts as a one-way valve in the seat drop function. The High-Gas DCA provides the gas pressure to function the seat drop thruster. No changes to the configuration shall be permitted without the authorization from the Naval Air Systems Command Headquarters AIR-4.6.1, AIR-4.1.1.2 (V-22) and the Bell-Boeing Joint Program Office. Since the Emergency Egress Hatch Removal Systems are designed for use only in military aircraft, there are no commercial applications for the DCA.