tion in naval aviation of an MF is to provide relocatable housing for aviation weapon systems and SE maintenance and related functions. They may be used on board ship as well as ashore. MFGR—Manufacturer. MFR—Memorandum for the Record—An MFR is used as an internal document to record supporting information that is not recorded elsewhere. Although informal, the MFR should be dated, signed, and show the signer’s organizational code. MFS—Monthly Flight Summary. MILSTRAP—Military Standard Transportation and Movement Procedures—A procedure to enlarge MILSTRIP by extending the uniform communicating procedures, codes, forms, and formats for the transmission of items and the financial inventory data. MILSTRIP —Military Standard Requisitioning and Issue Procedure—A uniform procedure es- tablished by the DOD for its own use to govern requisition and issue of material within standard priorities. MIM—Maintenance Instructions Manual—Contains instructions for and O-level, I-level, and D-level maintenance and servicing of a specific weapon system and related airborne equipment including SE. MIS—Management Information System. MISHAP, AIRCRAFT—A naval aircraft mishap is an unplanned event or series of events, directly involving naval aircraft which result in ten thousand dollars or greater cumulative damage to naval aircraft, other aircraft (DOD or non-DOD), and property (DOD or non-DOD). Property damage includes costs to repair or replace facilities, equipment, or material or an injury as defined in OPNAVINST 3750.6. MISSION— The objective, the task together with the purpose, which clearly indicates the action to be taken and the reason for it; In common usage, especially when applied to lower military units, a duty/task assigned to an individual; and The dispatching of one or more aircraft to accomplish one particular task. MISSION ESSENTIAL—Anything authorized and assigned to the approved combat and combat support forces which would be immediately employed to wage war and provide support for combat actions. MISSION ESSENTIAL SUBSYSTEM—Subsys- tems of an aircraft required to perform the designated missions as determined by use of the applicable MESM. MMCO—Maintenance Material Control Officer. MMP—Monthly Maintenance Plan—Provides for scheduled control of the predictable maintenance workload. MO—Maintenance Officer. MODULAR ENGINES—Those engines consisting of several independent assemblies called modules, which by design can be removed/replaced without major disassembly of the engine or other modules; for example, compressor, combustion, turbine, afterburner, gearbox, torquemeter, or combination thereof. MP & T—Manpower, Personnel, and Training as in manpower, personnel, and training coordinator. MR—Material Reporting. MRC—Maintenance Requirements Card—Sets of cards issued by COMNAVAIRSYSCOM, contain scheduled maintenance requirements applicable to I-level and O-level activities for the specific aircraft/SE for which they are issued. MSGID—Message Identification. MSR—Module Service Record. MT—Maintenance Time. MTF—Message Text Format (message). MTIP—Maintenance Training Improvement Pro- gram. NADEP—For the most part, civilians man naval aviation depots (NADEPs), which are Navy depot-level maintenance facilities. Military personnel at a NADEP help perform the intermediate and organizational maintenance work that is related to the depot facility. NALCOMIS OMA—Naval Aviation Logistics Command Management Information System Organizational Level Maintenance Activity—A modern, real time, on-line responsive computer- based automated MIS, allows Navy and Marine AI-16