CNATRA—Chief of Naval Air Training. CNO—Chief of Naval Operations. CO—Commanding Officer. COG—Cognizant (command that is responsible for providing support). COMMERCIAL DERIVATIVE NAVY AIR- CRAFT—Aircraft procured by the Navy for which there is a certified commercial counterpart. COMMON ITEM—An item of standard design, application, and specification, normally procurable from several manufacturers or suppliers, or available from only one manufacturer but with wide usage or of such design that the multiple application is apparent. COMNAVAIRESFOR —Commander Naval Air Reserve Force. COMNAVAIRLANT —Commander Naval Air Force U.S. Atlantic Fleet. COMNAVAIRPAC —Commander Naval Air Force U.S. Pacific Fleet. COMNAVAIRSYSCOM —Commander Naval Air Systems Command. CONDITIONAL INSPECTION—An inspection conducted as a result of a specific overlimit condition or as a result of circumstances or events which create an administrative requirement for an inspection. Examples of overlimit conditions include hard landing, overstress, overtemp, lightning strike, overweight takeoff or landing, and field arrestment. Examples of administrative actions or requirements include precarrier or postcarrier inspections, onetime inspections directed by higher authority (not directed by a TD), and compass calibrations (when not directed by special inspection MRCs). CONFIGURATION—The functional and physical characteristics of material as described in technical documents and achieved in a product. CONFIGURATION CONTROL—The systematic evaluation, coordination, approval or disapproval of proposed changes, and the implementation of all approved changes to the configuration of a configuration item, after formal establishment of its configuration identification. CONFIGURATION IDENTIFICATION—The cur- rent approved or conditionally approved technical documentation for a configuration item as set forth in specifications, drawings and associated lists, and documents referenced therein. CONFIGURATION ITEM LIST—A list of those status items designated for configuration control and configuration accounting. CONFIGURATION ITEM(S)—Items designated by DOD components for configuration management. They may differ widely in complexity, size, and kind. Examples are an aircraft, ship, mobile test unit, navigation system, embedded computer, computer program, facility, electronic system, test meter, or a round of ammunition. CONFIGURED ITEMS—Those selected items that require continuation of configuration status accounting during the operational phase. An item that affects mission capability and can be interchanged with a similar item that will result in a different mission capability. CONSOLIDATED SE LIST—A summary of government decisions on contractor’s SE recom- mendations and other pertinent data relative to support of the end article. It is a list of contractor recommended SE. CONSUMABLE ITEM—Any item or substance which, upon installation, loses its identity and is normally consumed in use or cannot be economically repaired. CONTAMINANTS —Particles of foreign material which may or may not be visible to the unaided eye. CONTRACT FIELD SERVICES—Those engineer- ing and technical services provided to DOD personnel by commercial or industrial companies on-site at defense locations by trained and qualified engineers and technicians. CONTRACTOR PLANT SERVICES—Those services provided to personnel of the military departments in the plants and facilities of the manufacturer of military equipment or components by trained and qualified engineers and technicians employed by the manufacturer. CONTROLLING CUSTODIAN—Air commands and COMNAVAIRSYSCOM fleet support units exercising administrative control of assignment, employment, and logistic support of certain aircraft and engines, as specified by the CNO. CONTROLLING CUSTODY—Administrative con- trol of the assignment, logistic support, AI-5