Aircraft Military Terminology

Military Aircraft Terminology

A. Alpha

AAF= Army Airfield

AAR= Air to Air Rocket

AB= After Burner (Also called Re Heat by the British)

AB= Air Base

ABDR= Aircraft Battle Damage Repair

ABFC= AB Fuel Control

AC= Aircraft Commander (Pilot)

ACC= Assistant Crew Chief

ACES= Advanced Crew Escape System

Acft= Aircraft

ACLS= Automatic Carrier Landing System

ACMI= Air Combat Maneuvering Instrumentation

ACRP= Armament Control Relay Panel. (Pronounced A Crap)

ACT= Air Combat Tactics

ADF= Automatic Direction Finder

AFB= Air Force Base

AFCS= Automatic Flight Control System (Autopilot)

Aft= After (Rear)

AGE= Aerospace Ground Equipment

AGL= Above Ground Level (Called Angel by ATC)

AGM= Air to Ground Missile

AGPU= Aviation Ground Power Unit

AHC= Antenna Hand Control

AIM= Air Intercept Missile

Air War Collage= Program for senior officers teaching advanced war planning

Alpha Probe= A vane used to measure pitch (AOA)

ALS= Automatic Landing System (Runway)

ALSE= Aviation Life Support Equipment

Alt= Altitude

AMRAAM= Advanced Medium Range Air to Air Missile

AOA= Angle Of Attack

APU= Auxiliary Power Unit

ARI= Aileron Rudder Interconnect

ARM= Anti Radiation Missile

ASB= Aviation Support Battalion

ASI= Air Speed Indicator

ASL= Above Sea Level

ASM= Anti Ship Missile

ATC= Air Traffic Control

ATK= Attack (As in attack unit)

Aug= Augmentation Used in conjunction with Pitch Aug (Stab), Yaw Aug (Rudder), and Roll Aug (Aileron). Part of the AFCS Altitude/Heading Hold system.

Auto Acq= Automatic Acquisition. Used with the Radar Boresight Mode. After three sweeps of the Radar, the Radar will automatically lock on to an airborne target.

AVTR= Airborne Video Tape Recorder

AWACS= Airborne Warning and Control System

AWG= Airborne Weapons Group

AWRU= Aircraft Weapons Release Unit. (Pronounced A Rue)

B. Bravo

Bait and Trap= A flight of aircraft flying low and slow using call signs of bombing aircraft to draw enemy fighters into attacking. The most successful was Operation Bolo performed by Col Olds of the 8th TFW.

Ballistic= Missile looses track or lock on and goes un guided

Ball Ammo= Ammo containing a soft outer casing with a hard core

Bandit= Identified Enemy Aircraft

Bar CAP= Barrier CAP

BCP= Both Cockpits

BDA= Battle Damage Assessment

BDHI= Bearing Distance Heading Indicator

BDU= Bomb, Dummy Unit

Bear= Rear seater in a Wild Weasel Acft

Beta Probe= A vane used to measure yaw

BFM= Basic Flight Maneuvers

BIT= Built In Test

Black Box= Flight Data Recorder & Cockpit Voice Recorder

Bingo= Point of safe return (Fuel)

BLC= Boundary Layer Control

BLU= Bomb, Live Unit

BN= Bombardier Navigator

Bogie= Unidentified Aircraft

Boresight Mode= A Radar mode where a very narrow cone from the Radar is transmitted. The target must be maintained within that narrow cone in order to maintain lock on.

BRU= Bomb Rack Unit. Bomb suspension unit allowing up to six bombs or other ordinance to be loaded. It is similar to a MER except it can carry more weight and is supersonic capable. Carried by the F-111 and F-15E

BUFF= Big Ugly Fat Fellow (B-52)

BVR= Beyond Visual Range

C. Charlie

CADC= Central Air Data Computer

CAG= Commander Air Group

CAG Bird= Personal Aircraft of the CAG

CAP= Combat Air Patrol

Cap= Captive. A non launchable weapon used for training

CAS= Close Air Support

CAS= Calculated Air Speed

CATM= Captive Air Training Missile

CB= Circuit Breaker

CBP= Circuit Breaker Panel

CBU= Cluster Bomb Unit

CC= Crew Chief

CCIP= Computer Controlled Impact Point

CFT= Conformal Fuel Tank

C/L= Center Line

Clean off Garbage= Jettison external stores

CLP= Center Line Pylon

CND= Could Not Duplicate

CO= Commanding Officer

COC= Chain Of Command

COD= Carrier Onboard Delivery

Code 1= Aircraft returns from flight with no discrepancies

Code 2= Aircraft returns from flight with minor discrepancies not effecting safety of flight

Code 3= Aircraft returns from flight with major discrepancies effecting safety of flight

Comp= Computer

CONUS= CONtinental United States

CP= Cockpit

CRP= Counter Rotating Propeller

CSAR= Combat Search And Rescue

CSD = Constant Speed Drive

CSD/Gen= CSD & Generator

CW= Continuous Wave (Radar)

D. Delta

DACT= Dissimilar Air Combat Tactics

Daisy Cutter= Any bomb with a 36" fuse extension so it will explode above ground

DCC= Dedicated Crew Chief

DCM= Deputy Commander for Maintenance

Departure= A condition where an aircraft enters un controllable flight

Depot= Acft goes through a complete tear down, inspection, and rebuild

DEROS= Date Estimated Return Over Seas

Det= Detachment

DME= Distance Measuring Equipment

DO= Deputy Commander for Operations

Drone= A RPV target

Dumb Bomb= Any free fall conventional bomb

Dump the Load= Drop Ordinance

E. Echo

EBAD= Engine Bleed Air Duct

ECM= Electronic Counter Measures

ECCM= Electronic Counter Counter Measures

EDGB= Engine Driven Gear Box

Egress= To leave an area or to eject from an aircraft

EGT= Exhaust Gas Temperature

ELINT= Electronic Intelligence

Eng= Engine

Envelope= Parameters of flight in which an aircraft can operate safely or effectively

EPR= Engine Pressure Ratio

ETA= Estimated Time of Arrival

ETD= Estimated Time of Departure

ETIC= Estimated Time In Commission

Eval= Evaluation

Ext= External

F. Fox Trot

FAC= Forward Air Controller

FBW= Fly By Wire

FCC= Flight Control Computer

FCF= Functional Check Flight (A test flight to check aircraft systems)

FCP= Front Cockpit

FDBC= Flight Directional Bombing Computer

FE= Flight Examiner

Feet Dry= Flying over land

Feet Wet= Flying over water

FF= Fuel Flow

FFAR= Folding Fin Aerial Rocket

FF Ind= Fuel Flow Indicator

FL= Flight Level

FLIR= Forward Looking Infra Red

FLR= Forward Looking Radar

Flt= Flight

FO= Foreign Object

FOD= Foreign Object Damage

FOL= Forward Operating Location

Fox= Fire Missile (Never say fire unless some one is burning)

FPM= Feet Per Minute

FUBAR= Fowled Up Beyond All Repair (or Recognition)

Fwd= Forward (Front)

G. Golf

GAR= Guided Aircraft Rocket

GB= Gear Box

GBU= Guided Bomb Unit

GCA= Ground Control Approach

GCU= Guidance Control Unit

GD= Gear Door

GIB= Guy In Back

GPH= Gallons Per Hour

GPM= Gallons Per Minute

GPS= Global Positioning System

GPU= Ground Power Unit

Green Flag= US Air Force sponsored electronic warfare training program

GS= Ground Speed

GSE= Ground Support Equipment

GTU= Gas Turbine Unit

H. Hotel

Hard Target= Armored vehicles, hardened buildings, or bunkers

Hard Wing= Aircraft equipped with or without leading edge wing flaps

HARM= High speed Anti Radiation Missile

HAS= Hardened Aircraft Shelter

HDGP= High Drag General Purpose (bomb)

Herd Sheep= Fighter aircraft push or herd enemy aircraft into a position where other fighters are in position to attack.

HF= High Frequency

HiPAC= High Pressure Air Compressor

HOTAS= Hands On Throttle And Stick

Horz= Horizontal

HSI= Horizontal Situation Indicator

HUD= Heads Up Display

HVAR= High Velocity Aerial Rocket

I. India

IAS= Indicated Air Speed

IAW= In Accordance With

IFE= In Flight Emergency

IFF= Identification, Friend or Foe

IFR= In Flight Refueling

IFR= Instrument Flight Rules

IGV= Inlet Guide Vanes (Eng)

ILS= Instrument Landing System

Inbd= Inboard

Ingress= To enter an area

Inert= Non explosive

Inop= Inoperative

INS= Inertial Navigation System

Inst= Instrument

Int= Internal

IP= Instructor Pilot

IR= Infra Red

IRAN= Inspect, Repair As Necessary (See Depot)

IRGB= Infra Red Guided Bomb

Iron= Conventional high explosive bomb

IRST= Infrared Search/Track

ISA= Integrated Servo Actuator

J. Juliet

Jammer= Aircraft used to jam enemy radar sites

Jammer Pod= ECM Pod

JATO= Jet Assist Take Off

JDAM= Joint Direct Attack Munition

Jett= Jettison

JFS= Jet Fuel Starter

JP= Jet Petroleum (fuel) (Followed by a number which specifies the grade of fuel such as JP-4 or JP-7)

JSAW= Joint Stand Off Weapon

JTIDS= Joint Tactical Information Distribution System

K. Kilo

K-Ball= Cannibalize (Taking parts from one aircraft or equipment to fix another)

KIAS= Knots, Indicated Air Speed

KIR= Keyed Interrogation Receiver (Part of the IFF system)

KIT= Keyed Interrogation Transmitter (See Above)

KTAS= Knots, True Air Speed

KTS= Knots

L. Lima

LABS= Low Altitude Bombing System

LAL= Left Aft Launcher

LANTIRN= Low Altitude Navigation and Targeting Infra Red for Night

LAPES= Low Altitude Parachute Extraction System

LAU= Launcher

Laugh In= Wing Commanders Staff Meeting

LCP= Left Center Pylon

LDG= Landing Gear

LDGP= Low Drag General Purpose (bomb)

LEF= Leading Edge Flaps

LES= Leading Edge Slats

LEX= Leading Edge Extensions

LF= Low Frequency

LFL= Left Fwd Launcher

LGB= Laser Guided Bomb

LIP= Left Inbd Pylon

LMG= Left Main Gear

LMGD= Left Main Gear Door

Lock On= Radar has acquired a target and is feeding information to a missile

LOP= Left Obd Pylon

LoPAC= Low Pressure Air Compressor

LORAN= Long Range Aerial Navigation

LOX= Liquid Oxygen

LRU= Line Replacement Unit

Lt= Left

M. Mike

M= Model

Maple Flag= Canadian sponsored aircrew air combat training program

MASI= Mach Air Speed Indicator

Max= Maximum

MCAS= Marine Corp Air Station

MDS= Mission Design Series (B-52H, Bomber, 52nd designed, number eight in the series)

MER= Multiple Ejector Rack. Bomb suspension adapter allowing up to six bombs or other ordinance to be loaded.

MFC= Main Fuel Control

MFD= Multi Function Display

MIG CAP= Aircraft performing CAP for strike aircraft

Mil= Military. Usually followed by a number which specifies type such as Mil-L-7808 (Engine Oil) Mil-H-5606 (Hydraulic Fluid)

Mike Mike= Millimeter (As in 20 Mike Mike)

Min= Minimum

MK= Mark

MLG= Main Landing Gear

MLGD= Main Landing Gear Door

MO= Maintenance Officer

MPT= Motion Pickup Transducer

MR= Main Rotor

MRP= Miscellaneous Relay Panel (also called Missy Panel)

MSL= Mean Sea Level

Mud Mover= Term used to describe ground support pilots

MWA= Missile Well Adapter

N. November

N1= Number one compressor section, low pressure (Engine)

N2= Number two compressor section, high pressure (Engine)

NAS= Naval Air Station

NBC= Nuclear, Biological, Chemical

NCOIC= Non Commissioned Officer In Charge

NDAS= Nose Dome Accessory Housing ( A covering that goes on front of engine covering the nose accessory drive section.)

NDB= Non Directional Beacon

NFT= No Fine Tune (Missile fails to finalize data from the aircraft Radar)

NLG= Nose Landing Gear

NLGD= Nose Landing Gear Door

NORDO= No Radio (Inop)

NPA= Non Powered Age (Ladders, work stands, oil and hydraulic service carts, jacks, etc)

NVG= Night Vision Goggles

O. Oscar

O2= Oxygen

O & B= Out and Back

Obd= Outboard

Office= Cockpit

OGB= Optical Guided Bomb

OIC= Officer In Charge

OPAH= Oil Pump Accessory Housing

OT&E= Operational Test and Evaluation

Over the wing= Method of refueling using hand held nozzel to fill each fuel tank or cell

P. Papa

PACAF= PACific Air Force

Paint= Radar is tracking several targets

PAM= Pylon Attachment Mechanism

PAR= Precision Approach Radar

PC= Primary Control

PCA= Permanent Change of Assignment

PCS= Permanent Change of Station

PCU= Power Control Unit

PDM= Programmed Depot Maintenance (Only items contracted will be accomplished at depot)

PFD= Personal Flotation Device

PGM= Precision Guided Munitions

Pickle= To fire or drop one weapon when the release button is depressed

PMS= Preventive Maintenance Service

Pnl= Panel

POL= Petroleum, Oil, Lubricant

Powered AGE= Generators, air conditioners, compressors, hydraulic test stands, etc.

PPH= Pounds Per Hour

PPM= Pounds Per Minute

PPI= Planned Point of Impact

Primary AB Eyelids= Interior adjustable exhaust nozzles, located inside the AB section

PSI= Pounds per Square Inch

PSOB= Pilots System Operators Bucket (Lower part of the ejection seat)

PTSP= Pressure/Temperature Sensor Probe (T shaped probe found inside of aircraft intakes)

Q. Quebec

QA= Quality Assurance (After 1978)

QC= Quality Control (Prior to 1978)

QD= Quick Disconnect

QRC= Quick Replacement Component

QRF= Quick Reaction Force

QRK= Quick Replacement Kit

QRM= Quick Replacement Module

R. Romeo

R2= Remove and Replace

R3= Remove, Repair, Reinstall

RADAR= Radio Aerial Detection And Ranging

RAF= Royal Air Force

RAL= Right Aft Launcher

RAM= Radar Absorbent Material

RAM Team= Rapid Area Maintenance Team

RAT= Ram Air Turbine

RATO= Rocket Assist Take Off

RCP= Rear Cockpit

RCP= Right Center Pylon

RCS= Radar Cross Section

RDF= Radio Direction Finder

Red Ball= Request for priority maintenance assistance

Red Flag= US Air Force sponsored aircrew air combat training program

RESCAP= Aircraft performing CAP for Rescue operations.

RF= Radio Frequency

RFL= Right Fwd Launcher

RHAW= Radar Homing And Warning

RIO= Radar Intercept Officer (USN) Also see WSO

RIP= Right Inbd Pylon

Rip & Strip= Parts are taken from one or more aircraft to fill fly away kits prior to a deployment

Ripple= Weapons release steps from station to station or pylon to pylon to maintain balance

RMG= Right Main Gear

RMGD= Right Main Gear Door

RNG= Range

ROE= Rules Of Engagement

RON= Remain Over Night

ROP= Right Obd Pylon

ROPE= Radome Open, Package Extended

RPV= Remote Piloted Vehicle

Rt= Right

R/T= Receiver, Transmitter

RWR= Radar Warning Receiver

S. Sierra

SAI= Standby Attitude Indicator

Salvo= Weapons will release or fire as long as release button is held down

SAM= Surface to Air Missile

SAR= Search And Rescue

Scan= Radar is looking or searching a specific area or location

SEADS= Suppress Enemy Air Defense System

Secondary AB Eyelids= Exterior adjustable engine exhaust nozzles

Sel= Select

Short Between Headset= Aircrew doesn’t know what he is talking about. Results in a lot of CND’s

SLAM= Stand-off Land Attack Missile

Slicks= Term used to describe the MK-80 series of low drag bombs

SLR= Side Looking Radar

SLUFF= Short Little Ugly Fat Fellow (A-7)

Smart Bomb= Any guided conventional bomb

SNAFU= Situation Normal, All Fowled Up

SOBAC= Signed Off By Air Crew

SOF= Supervisor Of Flying

Soft Target= Non armored vehicles

Soft Wing= Aircraft equipped with leading edge wing slats

Sortie= One flight or mission flown by an aircraft

SOV= Shut Off Valve

Special Weapon= A nuclear bomb

Speed of Heat= Traveling at max allowable speed

SPR= Single Point Refueling. An adapter is hooked to the aircraft allowing high pressure refueling. Normal flow is around 600 GPM

Squawk= Send or Transmit

Stab= Stabilizer

Stand Off= Safe area when attacking a target

Store(s) = Any external ordinance

STOL= Short Take Off and Landing

SWA= Special Weapons Adapter

SWP= Special Weapons Panel

T. Tango

T1= Number one turbine section (Engine)

T2= Number two turbine section (Engine)

TACAN= Tactical Air Navigation

TAD= Temporary Assigned Duty (USN & Marines)

TAIM= Training Air Intercept Missile (Fully functional missile with an inert warhead)

TARPS= Tactical Airborne Reconnaissance Pod

TAS= True Air Speed

TBA= To Be Announced

TBO= Time Between Overhaul

TDA= Temporary Duty Assignment (USN & Marines)

TDY= Temporary Duty (USAF)

TEF= Trailing Edge Flaps

TER= Triple Ejector Rack. Bomb suspension adapter allowing up to three bombs or other ordinance to be loaded

TFR= Terrain Following Radar

TIC= Target Intercept Computer

TIG= Time In Grade

TIS= Time In Service

TISEO= Target Identification System, Electro Optical

TIT= Turbine Inlet Temperature

TK= Tank (Fuel)

TLP= Tactical Leadership Program (German sponsored program teaching tactical leadership)

Top Gun= US Navy sponsored aircrew air combat training program

TP= Target Practice (Ammo)

TPT= Tail Pipe Temperature

TR= Tail rotor

Track= Radar is following one target (See Paint)

T/R Pac= Transformer/Rectifier Package

TTSP= Total Temperature Sensor Probe

Tune= Missile receiving data from the Radar prior to launch (See NFT)

Turkey Feathers= Aerodynamic covering that goes over the Secondary AB Eyelids

TWS= Track While Scan (Radar)

U. Uniform

UAV= Unmanned Aerial Vehicle

UHF= Ultra High Frequency

Unload= Maneuver where aircraft enters a negative G condition and at the same time engines put into Max AB. The result is rapid acceleration of the aircraft.

USAF= United States Air Force

USAFE= United States Air Force in Europe

V. Victor

Vert= Vertical

VFR= Visual Flight Rules

VHF= Very High Frequency

Victor Alert= Aircraft on alert status loaded with Nukes

VOR= VHF Omni-directional Radio

VTOL= Vertical Take Off and Landing

VVI= Vertical Velocity Indicator

W. Whiskey

WCP= Weapons Control Panel

Whiskey Alert= Aircraft on alert status loaded for Air to Ground mission

Willy Pete= White Phosphorus

Wing King= Wing Commander

WOD= Wind Over Deck

Wpn= Weapon

WRM= War Ready Material (Also War Reserve Material)

WSEM= Weapons System Evaluation Missile (Non launchable missile that contains a recorder to verify aircraft launch system). (Pronounced Wizzum)

WSEP= Weapons System Evaluation Program (Pronounced Wessup)

WSO= Weapons System Operator (Pronounced wizzo) (USAF)

WSP= Weapons Select Panel

WW= Wild Weasel. (Any aircraft used to kill radar sites)

X. X Ray

X-Mitter= Transmitter

X-Mit= Transmit

X-Ponder= Transponder

X-Ray Alert= Aircraft on Recon Alert Status

Y. Yankee

Yankee Alert= Aircraft on alert status loaded for RESCAP

Z. Zulu

Zulu= GM time

Zulu Alert= Aircraft on Air Defense Alert

Up dated 4 April 2011

Have a couple of Navy Terms. Don’t know if they’d be needed but what the hay

RIO- Radar Intercept Officer (Like the WSO in the Air Force)

TARPS-Tactical Airborne Reconnaisance Pod

You forgot GIB = Guy In Back

TARPS and GIB added. RIO was already listed. Thanks for your input.

A few more:

ACES = Advanced Crew Escape System (Ejection Seat)
ARM = Anti-Radiation Missile
AWG = Airborne Weapons Group
BarCAP = Barrier Combat Air Patrol
CAG = Commander, Air Group
CAG Bird = CAG’s personal aircraft
CSAR - combat search and rescue
CFT = Conformal Fuel Tank
ELINT = Electronic Intelligence
FAC = Forward Air Controller
IRST = Infrared Search/Track
JDAM = Joint Direct Attack Weapon
JSOW = Joint Stand-Off Weapon
JTIDS = Joint Tactical Information Distribution System
LANTIRN = low-altitude navigation and targeting infrared for night
RAM = Radar Absorbent Material
RCS = radar cross-section
SLAM = Stand-Off Land Attack Missile
TFR = Terrain Following Radar

List up dated. Thanks.

Here’s a couple we used in the Canadian military:

A/C - aircraft
U/S - un-servicable means the thing don’t work
SOP - Standard Operating Procedures

Here’s a couple of slight corrections.

RADAR, RAdio Detection And Ranging

RADAR is an odd one, it uses two letters of the first word, then the singles.

VOR, VHF Omni Range (or VHF Omnidirectional Range).

I never understood why ‘range’ was in there. the distance was provided with TACAN, civilian has VOR with DME. --edit-- nevermind on this. I found a reference that called it VHFOmni Radio Range

I’m pretty sure

INS is Inertial Nav System

and a new one

FLR Forward Looking RADAR (used on the RF-4C)

FLR and SLR added.

I checked my Pilots Flight manual put out by the FAA (1990) and Student Reference Guide (1977) put out by Embry Riddle. The FAA guide only tells how VOR works but the Embry Riddle guide gives a defination as VHF Omni-Directional Radio. So which one is correct?

As for RADAR, Balantine Books, 1960, Allied Secret Weapons Of WW ll, states the British first used the term RADAR. Their early system would only detect airborne targets so they named it Radio Aerial Detection And Ranging. The US was also working on a system, after the British started research. The US system was called “Detection by radio waves”. The US Navy also started research on a system years later. None of the other knew research was being done.

The US and Hughes was working one system and the Navy and Westinghouse was working another. The US system used a higher frequency and was able to detect airborne targets at a longer range. The British used a lower sprectrum frequency and had a much cleaner return. The Navy and Westinghouse used a mid spectrum frequency and a pulse signal which allowed them to pick up surface returns. After all three started working together the US system, which required a larger antenna and more power, was adapted using the Westinghouse pulse signal. The result was a very long range system that also could detect surface targets.

The British system was used for aircraft radar systems, using the pulse system. It did not require a large antenna or heavy generators to power the system.

You are correct on INS. I left the L off the end. I must have had my head up and locked. [:D]

You also left out:

TIRFU: This Is Really Fouled Up

FUBAR: Fouled Up Beyond All Recognition

alrighty Berny!![:P] I got this bookmarked now!![^]

I have added the following to the list.

AB

AFB

AVTR

FOL

JP

LOX

MCAS

MIL

NAS

O2

Pickle

POL

Ripple

Salvo

The following up dates have been added

Depot

IRAN

Lock On

Paint

PDM

SAI

Scan

Track

TWS

Very cool resource. Thanks for the effort Berny!

Some more that i did not notice:

CRP - Contra rotating propellor

CO - Commanding officer

Pitiot Tube - Measures the airspeed of ai aircraft

Airscrew - The Propellor

Pusher Propellor -

Tractor Propellor -

Reverse thrust -

Interuptor gear - Stops a machine gun from firing when the prop is in front of it

Here are a couple more:

ISA = Integrated Servo Actuator (the civilian version would be PCU = Power Control Unit)

TIT = Turbine Inlet Temperature

N1 RPM = Low pressure Turbine/Compressor RPM

N2 RPM = High pressure Turbine/compressor RPM

This one you already have CAS, but it can also be something else.

CAS = Calculated Air Speed

I will add CRP and CO to the list. The other items a self explanatory.

Thanks for the items. Just one question though. You listed N1 RPM and N2 RPM. Where did you find or hear about these terms. For the engines I am famaliar with, (J-33. J-47, J-57, J-75, J-79 and TF-33) the compressor section was named N1 (Low pressure side) and N2 (High pressure side). The J-33 had a single stage compressor and RPM was taken from that single stage. RPM was taken from the N2 section on all of the others. The Turbine section T1 (First stage turbine) and T2 (Second stage turbine) did not have a RPM reading or temperature reading. The temp was taken in the tail pipe (TPT or EGT).

Where i heard it is easy. Im an aircraft mechanic and heard about in my training. But you are right on most, if not all, of the twin spool engines the RPM read out in the cockpit is only the N2 RPM. But during engine tests you can also get a N1 RPM read out either in the cockpit or on some test equipment.

Berny

You list Fox as fire missile. I was always under the impression that when the pilot broadcast Fox 1, 2 or 3, he was announcing that he had just fired a missile with the number indicating type of missile - am I wrong in that?