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    Terms beginning with M

    179 terms from the estate's acronym catalogue.

    M-Code — Military Code
    Modernized GPS military signal providing enhanced anti-jam and anti-spoof protection through higher power, spot beaming, and new encryption. Transmitted on L1 and L2 frequencies.
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    M1 Abrams
    US main battle tank with 120mm smoothbore gun, composite/depleted uranium armour, and gas turbine engine. M1A2 SEPv3 features improved networking. ~70 tons.
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    MA — Mean Anomaly
    Fictitious uniformly-increasing angle used to parameterise time within an orbit.
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    MAC — Media Access Control
    The sublayer and unique hardware address governing access to a shared network medium.
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    Mach — Mach Number
    Ratio of true airspeed to the local speed of sound.
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    MAD — Mutual Assured Destruction
    Deterrence doctrine holding that nuclear conflict is prevented because both sides possess sufficient survivable second-strike capability to inflict unacceptable damage.
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    MADL — Multifunction Advanced Data Link
    The F-35 Lightning II primary stealth data link using phased-array directional antennas for LPI/LPD mesh networking between 5th-generation aircraft. Carries fused, correlated tracks rather than raw sensor data.
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    Magnetorquer
    An electromagnetic actuator that generates a magnetic dipole to interact with Earth's magnetic field, producing torque for attitude control. Low power but limited to LEO.
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    MAGTF — Marine Air-Ground Task Force
    Self-sufficient combined-arms Marine Corps unit integrating ground, air, and logistics elements under a single commander. The fundamental organizational building block of USMC operations.
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    MALD — Miniature Air-Launched Decoy
    An expendable air-launched decoy that replicates the radar signature of friendly aircraft to confuse adversary air defense systems. MALD-J variant adds jamming capability.
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    MALE — Medium-Altitude Long-Endurance
    A UAV class operating at 5 000–15 000 m altitude with 24+ hour endurance — MQ-9 Reaper, MQ-1C Gray Eagle, IAI Heron. Typical mission set: persistent ISR, communications relay, precision strike.
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    Malware
    Software intentionally designed to cause damage or unauthorised behaviour — viruses, worms, trojans, ransomware, rootkits, droppers. Modern adversaries chain stages (loader → implant → tooling) to evade detection across the kill chain.
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    MAN — Metropolitan Area Network
    A network spanning a city or metropolitan region, larger than a LAN but smaller than a WAN.
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    MANET — Mobile Ad-hoc Network
    A self-organizing, infrastructure-free wireless network of mobile nodes that route for each other.
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    MANPADS — Man-Portable Air Defense System
    A shoulder-fired surface-to-air missile. Modern systems (Stinger, Igla, Starstreak) threaten low-flying aircraft out to ~5 km, driving tactics such as high-altitude transit and directional infrared countermeasures.
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    MAP — Missed Approach Point
    The point on an instrument approach beyond which a missed approach must be executed if the runway is not in sight.
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    MARCH — Massive Hemorrhage, Airway, Respiration, Circulation, Hypothermia
    The prioritized sequence used in tactical trauma care to treat life threats in order.
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    MARFOR — Marine Corps Forces
    The Marine Corps component headquarters and forces assigned or attached to a joint force.
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    MARPOL — Marine Pollution (Convention)
    The international convention to prevent pollution of the marine environment from ships.
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    MASCAL — Mass Casualty
    An incident producing casualties in numbers that overwhelm available medical resources.
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    MASINT — Measurement and Signature Intelligence
    Intelligence from physical phenomena: nuclear detonations, chemical/biological agents, missile exhaust plumes, seismic events, and radar cross-sections.
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    Mass Budget
    A spacecraft's end-to-end accounting of dry mass, propellant, and contingency, allocated by subsystem and verified at each design review. Heritage growth contingency starts at 30% (PDR) and shrinks toward 5% (CDR). Drives launch-vehicle selection.
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    Matched Filter
    The optimal linear filter for detecting a known signal in additive white noise — the impulse response is the time-reversed complex conjugate of the transmitted waveform. Maximises output SNR at the correct sample instant.
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    Matrix Game
    A structured wargame format where each side proposes an action with supporting arguments, and the adjudicator resolves outcomes based on the strength of the argument. Balances analytic rigour with playability.
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    Maxar
    EO operator behind WorldView-Legion (30 cm optical, 15-min revisit) and the legacy WorldView-1/2/3/4 + GeoEye-1 fleet. Highest commercial spatial resolution. Stereo, multi-spectral, SWIR, video.
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    MaxQ — Maximum Dynamic Pressure
    The point of greatest aerodynamic load during ascent, a critical structural design condition.
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    MBSE — Model-Based Systems Engineering
    An approach to systems engineering using digital models as the primary artefact for requirements, design, analysis, and verification, replacing document-centric methods.
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    MC — Military Committee
    The senior military authority in NATO, advising political leaders and directing the strategic commanders.
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    MCM — Mine Countermeasures
    Operations to detect, classify, and neutralize naval mines. Includes minehunting (active search), minesweeping (mechanical/influence), and mine avoidance (routing around minefields).
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    MCMV — Mine Countermeasures Vessel
    A ship specifically designed and equipped to detect, classify and dispose of naval mines.
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    MCOO — Modified Combined Obstacle Overlay
    A graphic depicting how terrain affects military operations, categorizing terrain as restricted or unrestricted.
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    MCT — Mercury Cadmium Telluride
    A semiconductor material (HgCdTe) widely used for high-performance infrared detectors with tunable band gap.
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    MDA — Milestone Decision Authority
    The official empowered to approve entry of a DoD programme into each phase of the acquisition lifecycle (MSA → TMRR → EMD → P&D → O&S). For ACAT I it is the USD(A&S); for ACAT II it is the Component Acquisition Executive. Abbreviation also used for the Missile Defense Agency — disambiguate by context.
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    MDAP — Major Defense Acquisition Program
    A DoD acquisition program meeting Acquisition Category I dollar thresholds — RDT&E > US$525M or procurement > US$3.065B (FY22). MDAPs receive the highest oversight: USD(A&S) as MDA, quarterly SAR reports to Congress, and Nunn-McCurdy breach reporting.
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    MDM — Misinformation, Disinformation, and Malinformation
    Categories of false or misleading information used to deceive or manipulate target audiences.
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    MDMP — Military Decision Making Process
    US Army's 7-step staff planning process: Receipt of Mission, Mission Analysis, COA Development, COA Analysis (Wargame), COA Comparison, COA Approval, and Orders Production. Produces the OPORD.
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    MDO — Multi-Domain Operations
    US Army operating concept (MDO 1.5, evolving to MDO 2.0) integrating land, air, maritime, space, and cyber capabilities to defeat peer adversaries. Replaces AirLand Battle as the doctrinal frame for division- and corps-level fights.
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    MDP — Message Distribution Plan
    A pre-planned configuration file for Link 16 networks that defines time slot assignments, participant units, message types, and network architecture. Created during mission planning and loaded into MIDS terminals before operations.
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    MDR — Managed Detection and Response
    Outsourced service providing threat monitoring, detection, and response by a third-party security team.
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    MDS — Minimum Detectable Signal
    The smallest input signal power a receiver can detect at a specified probability of detection and false alarm.
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    MDT2 — Multi-Domain Task Force
    An Army formation designed to synchronize effects across land, air, sea, space, and cyberspace domains.
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    MDTD — Minimum Detectable Temperature Difference
    The smallest temperature difference at which an observer can detect the presence of a target through a thermal imager.
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    MDV — Mine Disposal Vehicle
    A remotely operated or expendable vehicle used to locate and neutralize seabed mines.
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    ME (Main Effort) — Main Effort
    The operation's decisive element — the subordinate unit on which the commander concentrates priority of fires, engineer support, and resources to achieve the decisive outcome. Designation can shift during an operation.
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    Mean Anomaly
    A fictitious angle that increases linearly with time, used as the time argument in Kepler's equation. Provides a mathematically tractable way to propagate an orbit without closed-form solutions for true anomaly.
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    MEB — Marine Expeditionary Brigade
    A mid-sized Marine air-ground task force built around a reinforced infantry regiment.
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    MECO — Main Engine Cut-Off
    Shutdown of the first-stage/main engines during ascent.
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    MEDEVAC — Medical Evacuation
    Movement of casualties from point of injury to medical care using dedicated, marked medical assets (e.g., Red Cross-marked helicopters). Provides en-route care. Distinct from CASEVAC, which uses any available transport without en-route care.
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    MEDEVAC9 — Nine-Line Medevac Request
    A standardized nine-line message format used to request medical evacuation of casualties.
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    MEF — Marine Expeditionary Force
    The largest standing Marine air-ground task force, built around a Marine division and aircraft wing.
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    Megaconstellation
    LEO constellation with 1,000+ satellites engineered for global broadband or persistent EO coverage. Examples: Starlink (~6,000+), OneWeb (~650), Kuiper (3,236 planned), Guowang. Economics depend on launch cadence + manufacturing throughput, not satellite lifetime.
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    MEKF — Multiplicative Extended Kalman Filter
    An attitude estimator using quaternion multiplicative error to avoid singularities in the covariance update.
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    MEL — Minimum Equipment List
    An approved list specifying which instruments and equipment may be inoperative while an aircraft remains dispatchable.
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    MEO — Medium Earth Orbit
    Orbits with altitude between approximately 2,000 km and 35,786 km. Used primarily by navigation constellations (GPS at ~20,200 km, Galileo at ~23,222 km).
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    MEO-nav — Medium Earth Orbit Navigation constellation
    The orbital regime around 20,000 km altitude used by GNSS constellations for global coverage.
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    METAR — Meteorological Aerodrome Report
    A coded report of current observed weather conditions at an airport, issued at regular intervals.
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    Meteosat
    EUMETSAT geostationary weather satellites covering Europe / Africa / Indian Ocean. Currently MTG-I and MSG legacy fleet. 10-min full-disk imaging, lightning, infrared sounder.
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    METL — Mission Essential Task List
    The list of tasks a unit must be able to perform to accomplish its wartime mission. Each METL task has associated conditions and standards. TTPs provide the methods for executing METL tasks; METL provides the training requirements that drive TTP development.
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    METT-T — Mission, Enemy, Terrain & weather, Troops & support, Time available
    The five planning factors a leader considers when making a tactical estimate. The "TC" suffixed variant (METT-TC) adds Civil considerations. Foundational to troop-leading procedures.
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    METT-TC — Mission, Enemy, Terrain, Troops, Time, Civilians
    The mission variables commanders analyze to understand a tactical situation.
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    MEU — Marine Expeditionary Unit
    A forward-deployed Marine air-ground task force of about 2,200 personnel embarked on amphibious ships.
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    MF — Medium Frequency
    The radio band from 300 kHz to 3 MHz, used for AM broadcast and maritime comms.
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    MFA — Multi-Factor Authentication
    Authentication requiring two or more independent factors to verify a user identity.
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    MFD — Multi-Function Display
    A configurable cockpit screen that can present navigation, systems, engine, or other information as selected.
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    MFR — Multifunction Radar
    A radar that performs search, track, and other functions simultaneously by rapidly scheduling agile electronically steered beams.
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    MFTA — Multi-Function Towed Array
    A modern passive/active towed sonar array providing ASW detection for surface combatants.
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    MGRS — Military Grid Reference System
    NATO standard ground referencing system. Alphanumeric identifier: Grid Zone Designator + 100km square + easting/northing. Used for fire support and ground coordination.
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    MHC — Mine Hunter, Coastal
    A coastal ship equipped to hunt and neutralize mines in near-shore waters.
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    MICAP — Mission Capability
    A high-priority supply requisition status for parts needed to restore a grounded system to capability.
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    MICLIC — Mine Clearing Line Charge
    Rocket-projected line charge (~106 m of C-4) used to clear a lane through a mine and wire obstacle. M58 MICLIC is the standard towed launcher; AAV Mk1 carries a triple-shot launcher.
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    Microgravity
    The near-absence of perceived gravitational acceleration on a free-falling spacecraft (~10⁻⁶ g on ISS). Not "zero gravity" — Earth's gravity at ISS altitude is ~89% of surface value; the spacecraft and contents fall together. Drives unique fluid, combustion, and life-science research.
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    MicroSat — Microsatellite
    A satellite of approximately 10–100 kg wet mass. Sits between nanosats / CubeSats and minisats. Typical bus volume ~10–100 L. Often used for technology demonstration, scientific payloads, and small constellations.
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    Midcourse Phase
    The long exo-atmospheric coast of a ballistic missile between burn-out and re-entry. Longest phase (typically 10–25 min for an ICBM) and the target window for GBI and SM-3-class interceptors operating outside the atmosphere.
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    Midlife Upgrade
    A planned major modification at roughly half a system's service life, refreshing capability and reliability. Common in fighter aircraft (F-16 MLU), warships, and constellation refresh blocks. Often more cost-effective than retiring and replacing.
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    MIDS — Multifunctional Information Distribution System
    The miniaturised Link 16 radio terminal standard for fighter aircraft. MIDS-LVT (Low Volume Terminal) provides TDMA-based tactical data link capability in a 4-slot modular package. MIDS-JTRS adds software-defined radio capability.
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    MIL — Model-in-the-Loop
    Closed-loop test where a behavioural model executes against a plant model — earliest of the in-the-loop tiers. Used to validate algorithms before any code is written. Common in Simulink-driven control-law development.
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    MIL-HDBK — Military Handbook
    A DoD document providing guidance, procedures, and reference data supporting military standards.
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    MIL-SPEC — Military Specification
    A U.S. Department of Defense document specifying the requirements a product must meet for military use.
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    MIL-STD — Military Standard
    US Department of Defense standards specifying technical requirements for defense systems, processes, and testing. Key examples: MIL-STD-461 (EMC), MIL-STD-810 (environmental), MIL-STD-1540 (test).
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    MIL-STD-1553
    US military standard for a serial 1 Mbit/s command/response data bus on a redundant shielded twisted pair. One Bus Controller orchestrates traffic to up to 31 Remote Terminals. Found on virtually every Cold War-era and modern combat platform.
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    MIL-STD-810
    US military environmental engineering standard specifying test methods for mechanical shock, vibration, thermal cycling, humidity, altitude, salt fog, sand/dust, and EMI exposure. Current revision MIL-STD-810H (2019). Tailored test plans agreed during system development.
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    MIL-STD-882
    US DoD Standard Practice for System Safety. Defines the system safety process (hazard identification, risk assessment with severity × probability matrix, mitigation hierarchy). Mandatory across DoD acquisition programmes.
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    MILDEC — Military Deception
    Actions to deliberately mislead adversary decision-makers about friendly capabilities and intentions.
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    MILES — Multiple Integrated Laser Engagement System
    A laser-based training system simulating direct-fire weapons effects during force-on-force exercises. Detectors on personnel/vehicles register hits without live ammunition.
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    MILSTRIP — Military Standard Requisitioning and Issue Procedures
    The standardized system of codes and formats used to requisition and issue military supplies.
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    MIMO — Multiple-Input Multiple-Output
    A radar or communications architecture using multiple transmit and receive channels to improve resolution and robustness.
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    MiniSat — Minisatellite
    A satellite of approximately 100–500 kg wet mass. Sits between microsats and large platforms. Typical of operational SAR satellites and dedicated science missions where a CubeSat is too small but a multi-tonne platform is overkill.
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    MIO — Maritime Interdiction Operations
    Operations to board, search and, if needed, divert vessels to enforce sanctions or interdict cargo.
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    MIRV — Multiple Independently-targetable Re-entry Vehicle
    A missile payload carrying multiple warheads, each capable of striking a different target. Complicates missile defense by multiplying objects to intercept.
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    MISO — Military Information Support Operations
    Planned operations to convey selected information to foreign audiences to influence their behavior.
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    Missile Envelope
    The 3D region around a launching aircraft or platform within which a missile can engage a target. Bounded by min/max range, altitude limits, off-boresight angle, and target aspect. Captured in the LAR (Launch Acceptability Region).
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    Missile Guidance
    The set of algorithms commanding a missile's control surfaces to intercept its target. Common laws: PN (proportional navigation), augmented PN, optimal control, model-predictive. Drives the seeker-FOV and divert-thrust requirements.
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    Mission Assurance
    Integrated discipline of protecting mission-essential functions against kinetic, cyber, electromagnetic, and supply-chain threats. Extends beyond traditional security and survivability to include dependencies on commercial infrastructure (power, telecoms, SATCOM).
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    Mission Command
    A command-and-control philosophy emphasising commander's intent and decentralised execution. Subordinates exercise disciplined initiative within the intent when the situation diverges from plan or communications are lost.
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    Mission Design
    The early-phase definition of a mission — orbit selection, payload sizing, ConOps, ground architecture, schedule, cost. Informed by customer requirements and constrained by available technologies. Outputs the mission concept review (MCR) baseline.
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    Mission Operations
    The execution-phase activities sustaining a fielded system — flight ops, ground ops, planning, anomaly response, contact scheduling. Distinct from acquisition (cradle), development (toddler), and disposal (grave).
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    Mission Types
    The categorisation of space or military missions by their primary purpose — Earth observation, communications, navigation, science, deep-space exploration, intelligence, strike, etc. Each carries distinct requirements, orbits, and architectures.
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    MITM — Man-in-the-Middle
    Attack where an adversary secretly intercepts and possibly alters communication between two parties.
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    MITRE
    US not-for-profit operating Federally Funded Research and Development Centers (FFRDCs) including the National Cybersecurity FFRDC. Author of the ATT&CK adversary-behaviour catalogue, the CVE programme, and numerous defence systems engineering frameworks.
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    MITRE ATT&CK
    A globally-accessible knowledge base of adversary tactics and techniques based on real-world observations. Structured as a matrix of tactics (columns) and techniques (rows) used for threat modelling, detection engineering, and red-teaming.
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    MITRE D3FEND
    A knowledge graph of defensive cyber counter-measures developed by MITRE under NSA funding, published 2021. Complements ATT&CK: where ATT&CK enumerates attacker techniques, D3FEND enumerates the defensive techniques that detect, isolate, deceive, evict, or restore against them.
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    MIW — Mine Warfare
    The strategic and tactical use of sea mines and the countermeasures to detect and neutralize them.
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    MJD — Modified Julian Date
    A continuous day count offset from the Julian Date, convenient for spacecraft time arithmetic.
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    MK46 — Mark 46 Lightweight Torpedo
    A widely used lightweight ASW torpedo deployed from surface ships and aircraft.
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    MK48 — Mark 48 Torpedo
    A heavyweight, wire-guided submarine-launched torpedo for anti-submarine and anti-surface use.
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    MK54 — Mark 54 Lightweight Torpedo
    A lightweight ASW torpedo launched from ships, aircraft and ASROC against submarines.
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    MLAT — Multilateration
    A surveillance technique that locates aircraft by measuring the time difference of signal arrival at multiple ground receivers.
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    MLI — Multi-Layer Insulation
    Passive thermal control blankets of multiple thin reflective film layers (aluminised Mylar/Kapton) separated by spacers. Reduces radiative heat transfer to/from spacecraft.
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    MLS — Multi-Level Security
    Handling of multiple classification levels within one system.
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    MLW — Maximum Landing Weight
    The maximum weight at which an aircraft is certified to land under normal operating conditions.
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    mm-wave — Millimetre Wave
    The radio frequency range 30–300 GHz (wavelengths 1–10 mm). High atmospheric absorption at ~60 GHz (oxygen) and ~180 GHz (water vapour) limits propagation; used for short-range weapons seekers and automotive radar.
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    MMEL — Master Minimum Equipment List
    The manufacturer-approved baseline from which an operator develops its specific minimum equipment list.
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    MMH — Monomethylhydrazine
    A storable hypergolic fuel commonly used in spacecraft propulsion and reaction control thrusters.
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    MMOD — Micrometeoroid and Orbital Debris
    The population of small natural and artificial particles posing impact hazards to spacecraft.
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    MMW — Millimeter Wave
    Radar and sensing in the roughly 30–300 GHz band, offering fine resolution and compact antennas at short range.
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    mmWave — Millimeter Wave
    Radio frequencies roughly 30 to 300 GHz with millimeter wavelengths, used by 5G and radar.
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    MOB — Man Overboard
    The emergency situation and recovery procedure when a person falls from a vessel into the water.
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    MOC — Maritime Operations Center
    The command node that plans, directs and assesses maritime operations for a fleet commander.
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    MODLOC — Miscellaneous Operational Details, Local Operations
    A designated area where a ship maneuvers to remain on station rather than steaming a fixed track.
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    Modulation
    The process of encoding digital information onto a carrier wave by varying its amplitude, frequency, or phase. Common satellite schemes: BPSK, QPSK, 8PSK, 16/64-QAM.
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    MOE — Measure of Effectiveness
    Operational outcome measure of mission success.
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    Molniya — Molniya Orbit
    Highly elliptical orbit (e≈0.74, i=63.4°) with 12-hour period. Provides long dwell over high latitudes.
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    Molniya Orbit
    A highly elliptical orbit with ~63.4-degree inclination (to freeze the argument of perigee), 12-hour period, with apogee over the Northern Hemisphere for extended coverage of high latitudes.
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    Moment of Inertia
    A body's resistance to angular acceleration about a given axis (kg·m²). The rotational analogue of mass, critical for sizing attitude control actuators.
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    MON — Mixed Oxides of Nitrogen
    Nitrogen tetroxide with dissolved nitric oxide, an oxidizer offering a lower freezing point for storability.
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    Monte Carlo Simulation
    A method that draws random samples from input distributions and computes the resulting output distribution by repeated trials. Used for kill-chain assessment, mission Pk, contested-environment ops research, and any system with too many coupled stochastic factors for analytic solution.
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    MOP — Measure of Performance
    System-level performance measure feeding an MOE.
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    MOPP — Mission Oriented Protective Posture
    A system of graduated protective equipment levels (0-4) for CBRN defense. Each level prescribes specific protective gear: MOPP 0 (gear available), MOPP 4 (full protection — suit, boots, mask, gloves). Commanders balance protection against heat stress and degraded performance.
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    MOS — Military Occupational Specialty
    A code identifying a specific job, skill, and role for an enlisted service member.
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    MOSAIC — Image Mosaic
    A composite image formed by geometrically aligning and blending multiple overlapping images into one.
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    Mosaic Defense
    A DARPA-originated concept of disaggregating capability across many small, networked, attritable nodes rather than a few exquisite platforms. Composability under contested communications — like assembling a mosaic from interchangeable tiles.
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    Diagram
    MoSCoW — Must/Should/Could/Won't
    A requirements prioritisation technique categorising requirements by criticality: Must have, Should have, Could have, and Won't have (this time).
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    DiagramTry it: Project Execution GuideTry it: Cbrn Defense GuideTry it: Reference Frame Visualizer+1 more
    MPLS — Multiprotocol Label Switching
    A forwarding technique that routes packets by short labels instead of long network addresses.
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    MPPT — Maximum Power Point Tracking
    Power electronics technique dynamically adjusting solar array operating point to extract maximum available power as temperature and illumination conditions change.
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    MPRA — Maritime Patrol and Reconnaissance Aircraft
    Fixed-wing aircraft conducting long-range ASW, surveillance and reconnaissance over the ocean.
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    MPRF — Medium Pulse Repetition Frequency
    A pulse-Doppler PRF regime that balances range and velocity ambiguities, common in airborne fire-control radars.
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    MPS — Monopropellant Propulsion System
    A propulsion system decomposing a single propellant such as hydrazine over a catalyst to produce thrust.
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    MQ-9 Reaper
    MALE remotely piloted aircraft carrying Hellfire missiles, GBUs, and ISR sensors. 27+ hour endurance. Primary US strike/ISR UAS platform.
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    MRBM — Medium-Range Ballistic Missile
    Ballistic missile with range of 1,000-3,000 km. Poses regional threats requiring layered BMD architecture.
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    MRL — Manufacturing Readiness Level
    A 1–10 scale complementing TRL, assessing the maturity of the manufacturing process from initial research to full-rate production. Developed by the DoD to address production-side programme risk.
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    DiagramTry it: Orbat Guide
    MRO — Maintenance, Repair, and Overhaul
    The activities that keep equipment operational, including servicing, repair, and full overhaul.
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    MRP — Material Requirements Planning
    A planning method that computes material and component needs from demand and the bill of materials.
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    MRTD — Minimum Resolvable Temperature Difference
    The smallest temperature difference at which an observer can resolve a bar pattern through a thermal imager.
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    MRW — Maximum Ramp Weight
    The maximum weight authorized for ground maneuvering, including fuel burned during taxi before takeoff.
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    MSA — Materiel Solution Analysis
    The early acquisition phase that analyzes potential materiel solutions to a validated capability need.
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    MSAW — Minimum Safe Altitude Warning
    A ground system that alerts controllers when a tracked aircraft descends below a safe altitude for terrain or obstacles.
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    MSC — Military Sealift Command
    The command that operates the civilian-crewed ships providing sealift and fleet logistics.
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    MSI — Multispectral Imagery
    Imagery captured in several discrete spectral bands to distinguish materials by their reflectance signatures.
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    MSK — Minimum-Shift Keying
    A continuous-phase frequency-shift keying with the minimum modulation index for orthogonality.
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    MSL — Mean Sea Level
    Altitude reference datum based on average sea level.
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    MSR — Main Supply Route
    Primary road/route for moving supplies and equipment to forward units. Route security, capacity, and condition directly impact operational tempo.
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    MTAC — Mine Tactical Assessment Cell
    A staff cell that plans, coordinates and assesses mine countermeasures operations.
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    MTBCF — Mean Time Between Critical Failures
    The average operating time between failures that cause loss of a critical function or mission capability.
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    MTBF — Mean Time Between Failures
    Average time a system operates before experiencing a failure. Key reliability metric for weapon systems. Drives maintenance planning and spare parts requirements.
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    MTBM — Mean Time Between Maintenance
    The average time between all maintenance actions, both corrective and preventive, on an item.
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    MTBUR — Mean Time Between Unscheduled Removals
    The average operating time between unscheduled removals of a component from equipment.
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    MTD — Moving Target Detector
    A digital signal processor using Doppler filter banks and clutter maps to detect moving targets in clutter.
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    MTF — Modulation Transfer Function
    A measure of how well an imaging system preserves contrast as a function of spatial frequency.
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    MTI — Moving Target Indication
    Radar processing that suppresses clutter to reveal moving targets.
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    MTM — Magnetometer
    A sensor measuring the local magnetic field vector, used for attitude estimation and magnetorquer control.
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    MTOE — Modified Table of Organization and Equipment
    A document authorizing a specific unit’s personnel and equipment based on its mission.
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    MTOW — Maximum Take-Off Weight
    Greatest weight at which an aircraft is certified to take off.
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    MTQ — Magnetorquer
    An electromagnetic coil that interacts with Earth's magnetic field to produce torque for momentum dumping and control.
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    MTT — Multiple Target Tracking
    The process of maintaining tracks on many targets simultaneously by associating measurements over time.
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    MTTD — Mean Time to Detect
    Average time between initial compromise and detection of a breach by security operations. Industry average exceeds 200 days. Critical SOC performance metric.
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    MTTF — Mean Time To Failure
    The average operating time to failure for a non-repairable item that is discarded rather than fixed.
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    MTTR — Mean Time To Repair
    Maintainability metric of average corrective repair time.
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    MTU — Maximum Transmission Unit
    The largest packet size in bytes that a network link can carry without fragmentation.
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    MU (μ) — Gravitational Parameter
    Earth's gravitational parameter: 398,600.4418 km³/s². μ = GM.
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    MU-MIMO — Multi-User Multiple-Input Multiple-Output
    A MIMO mode that serves several users simultaneously on the same time-frequency resource.
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    Multi-Domain
    Operations conducted simultaneously across two or more of the warfighting domains (air, land, maritime, space, cyber). The dominant operational concept driving US Army MDO, USAF MDC2, USN DMO, and NATO Multi-Domain Operations.
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    DiagramTry it: Ttps GuideTry it: Mil Ops Degraded EnvironmentsTry it: Military Doctrine Guide+1 more
    Multi-INT — Multi-Intelligence
    Fusion of multiple intelligence disciplines (SIGINT, IMINT, GEOINT, HUMINT, MASINT, OSINT) into a single situational picture. Enables corroboration that no single INT can provide and is the working level of modern all-source analysis.
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    DiagramTry it: Multiint Fusion GuideTry it: Ssa GuideTry it: Defense Missions Guide+1 more
    Multispectral
    An imaging technique that captures data in several discrete spectral bands (typically 3-10), enabling basic material and land-use classification through band ratios and indices.
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    DiagramTry it: Space Fundamentals GuideTry it: Space Remote Sensing GuideTry it: Defense Fundamentals Guide+1 more
    MUM-T — Manned-Unmanned Teaming
    Tactical employment pattern where crewed platforms control one or more uncrewed wingmen for ISR, strike, or protection. US Air Force Collaborative Combat Aircraft and Army Future Vertical Lift programmes centre on MUM-T.
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    Diagram
    MUOS — Mobile User Objective System
    US Navy narrowband military SATCOM constellation in GEO providing worldwide UHF communications with WCDMA waveform. Replaces legacy UFO system.
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    MUSIC — Multiple Signal Classification
    High-resolution direction-of-arrival estimation algorithm.
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    MWIR — Mid-Wavelength Infrared
    The infrared band roughly 3–5 microns, a primary thermal-imaging band with an atmospheric transmission window.
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    MWS — Missile Warning System
    Sensor system that detects incoming missiles by their plume, RF, or kinematics and alerts the crew.
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