R

r.

rain, range, rare, red, right, river, roentgen, run.

R.

rabbi, radical, radius, railroad, railway, real, Reaumur, republican, resistance, response, rex, road, rook, rough, royal, ruble, rupee, (Phys.) Resumer, Rankine

®

Registered mark

R & D

Research and Development

R&M

Reliability and Maintainability

R(or r)

(Elec. Eng.) resistance

R. Adm.

rear admiral

R.A.

(Astron.) right ascension

R.A.A.F.

Royal Australian Air Force

R.A.F.

Royal Air Force

R.A.M.

Royal Academy of Music

R.A.S.

  (Aero.) rectified air speed

R.B.A.

Royal Society of British Artists

R.B.C.

red blood cells, red blood count

R.B.S.

Royal Society of British Sculptors

R.C.

(Civ. Eng.) reinforced concrete

R.C.A.F.

Royal Canadian Air Force

r.f.

radio frequency, rapid-fire

R.F., r.f.

(Chem.) reducing flame, (Radio.) radio frequency,

(Eng.) running fit

R.G.S.

Royal Geographical Society

R.H. or r.h.

(Metear.) relative humidity, right hand,

Royal highness

R.I.

Rhode Island (Phys.) refractive index

R.I.P.

may be or she or they rest in peace

R.M.A.

Royal Military Academy

R.M.S.

Royal Mail Service, Royal Mail Steamer

R.N.

registered nurse, Royal Navy

R.N.Z.A.F.

Royal New Zealand Air Force

R.O.D.

refused on delivery

r.p.m. or R.P.M.

revolutions per minute

r.p.s. or R.P.S.

revolutions per second

R.R.

railroad, rural route

R.S.

right side, Royal Society

R.S.A.

Royal Scottish Academey

R.S.V.P.

(F. repondez s’il vous plait)

R.V.

(Eng.) relief valve

R.W.P.

(Build.) rain-water pipe

R/Nav

Calculates position, distance and time from groups of airways beacons.

R/T

receiver/transmitter, or radiotelephone, or RadioTelephony

R/T

(Radio.) radiotelephony

Ra

(Chem.) radium

RA,

regular army, royal academy

RAAC

Royal Australian Armored Corps

RAAMS

Remote anti-armor mine system

RAC

Royal Armored Corps

RACE

Rapid Area Clearance Equipment

rad.

radical, radio, radius, radix

RADIC

Rapidly Deployable Integrated Command and Control System

RAE

Royal Australian Engineers Royal Aircraft Establishment

RAF

Royal Air Force (U.K.)

RAFVR

Royal Air Force Voluntary Reserve

RAM

Radar Absorptive Material

RAM

random access memory

RAM

Rolling Airframe Missile

RAMBS

Rapid Anti-personnel Minefield Breaching System

RANSAC

Range surveillance aircraft.

RAP

Regimental Aid Post

rap.

rapid

RAPID

Reorganized Army Plains Infantry Division

RAPIDS

radar passive identification system

RARDE

Royal Armament Research and Development Establishment

RARDE(C)

Royal Armament Research and Development Establishment (Christchurch)

RAS

Remote Active Spectrometer

RAS

replenishment at sea

RAST

(1) Recovery, assist, secure and traverse (helicopter) (2) radar-augmented subtarget

RAT

Ram air turbine.

RATO

Rocket-assisted take-off

RATT

Radioteletype

RAU

radio access unit

RAW

Rifleman's Assault Weapon

Rb

Robot (Swedish)

Rb

(Chem.) rubidium

RB/ER

reduced blast/enhanced radiation

RBC

red blood corpuscles

RBEB

Ribbon bridge erection boat

RBU

Anti-submarine rocket launcher

RC

Reserve Component

RCA

Riot Control Agents

RCAF

Royal Canadian Air Force

RCATV

Remote control, all-terrain vehicle

RCC

Rescue Control Center, or Regional Control Center

RCC

Rescue Coordination Center or Revolutionary Command Council (Iraq)

RCL

recoilless launcher

RCL

Recoilless. A weapon which eliminates the recoil force by balancing the momentum of the projectile's forward movement by the momentum of a body of gas or solid material ejected rearwards from the breech. Adopted so as to save the weight of a conventional recoil system and carriage or mounting.

RCMAT

radar-controlled miniature aerial target

RCMDS

remote-control mine disposal system

RCS

radar cross-section

RCT

Royal Corps of Transport

rct.

recruit

RCU

Remote-Control Unit

rd

(Phys.) Rutherford, rod

RD

refer to drawer

RD&A

Research, Development and Acquisition

rd.

road, rod, rods, round

RDA

Remote Display/Alarm

RDAF

Royal Dutch Air Force

RDB

Rapid deployment bridge

RDBMS

relational database management system

RDF

Rapid Deployment Force or Radio Direction Finding

RDF

(Radio) radio direction-finder

RDIT

Rapid Deployment Imagery Terminal

RDJTF

Rapid Deployment Joint Task Force

RDP

radar data processor

rds/min

rounds per minute

RDSS

rapidly deployable surveillance system

RDT&E

Research, Development, Test and Evaluation

RDX

Research Department formula X

RE

range error probable

Re

(Chem.) rhenium

re.

reference, regarding

Re.

rupee

Reaum.

Reaumer (thermometer)

rec.

receipt, recipe, record, recorder,

recording, recreation

recce

reconnaissance

recd.

received

recip.

reciprocal, reciprocity

Recon.

Reconnaissance

rect.

receipt, rectangle, rectangular, rector

Red Horse

Rapid Engineer Deployable, Heavy Operational Repair Squadron, Engineer

red.

reduce, reduction

ref.

referee, reference, referred, reformation, reformed

refanned

Gas turbine engine fitted with new fan of higher BPR.

refl.

reflection, reflective, reflex, reflexive

REFORGER

Return of Forces to Germany

refr.

refraction

reg.

regiment, region, register, registered, registrar,

 regular, regularly, regulation

regd.

registered

regt

regiment

regt.

regent, regiment

rel.

relating, relative, relatively, released

religion, religions

relig.

religion

REMBASS

Remotely Monitored Battlefield Sensor System (USA)

REME

Royal Electrical and Mechanical Engineers

REMIS

Reliability and Maintainability Information System

rep.

repair, report, reported, reporter

representative, republic

Rep.

Republican

repl.

replace, replacement

rept.

report

req.

require, required, required, requisition

reqd.

required

res.

research, reserve, residence, resigned, resolution

resp.

respective, respectively

ret.

retain, retired, return, returned

retd.

retained, retired, returned

rev.

revenue, reverend, reverse, review, reviewed, revise, revised, revision, revolution, revolving

REWTS

responsive electronic warfare training system

RFI

Request for Information

RFI

request for information radio frequency interference radio frequency interferometer

RFMD

RED FLAG Measurement Debriefing

RFP

request for proposals

RFQ

request for quotations

RFS

radio frequency surveillance

RG

Rio Group

RGB

red, green and blue. The three primary colors which are used to make up a color display. Implies full color when applied to image generation or display systems.

RGFC

Republican Guard Force Command (Iraq)

Rh

(Chem.) rhodium

RHD

Right-hand drive

rhet.

rhetoric

RHI

range height indicator

RHWR

radar homing and warning receiver

RIB

Rigid inflatable boat

RIBS

Readiness in Base Services

RICE

Royal Internal communications equipment (UK)

RIM

ship-launched surface-to-air missile designator (USA)

RIO

radar intercept officer

RIPP

radar information processing post

RISC

reduced instruction set computer

RIU

Radio Interface Unit

riv.

river

RJAF

Royal Jordanian Air Force

rkt

rocket

RL

rocket launcher

RLC

Royal Logistical Corps

RLT

Regimental Landing Team

RLT

Rolling liquid transporter

RM

reichsmark

RM&T

reliability, maintainability and testability

rm.

ream, room

RMI

Radio magnetic indicator combines compass and navaid bearings.

RMID

Road mine detector

rms

root mean square

Rn

(Chem.) radon

rnd.

round

RO

Receive Only

RO/RO

Roll On/Roll Off

ROC

Required Operational Characteristics

ROCC

region operations control center

ROE

Rules of Engagement

ROM

read only memory

Rom.

Roman, Romance, Romanian

ROMANS

Rapid operational minefield attack and neutralization system

RON

Research octane number

ROPS

Rollover protective structure

ROR

range only radar

rot.

rotating, rotation

ROTHR

Relocatable Over-The-Horizon Radar

ROV

remotely operated vehicle

ROW.

Right of way

ROWPU

Reverse osmosis water purification unit

RP

reporting post

RP.

(Teleg.) reply paid

rpm

revolutions per minute

rpt.

repeat, report

RPV

Remotely Piloted Vehicle

RRA

Radar Reflective Area

RRC

rapid-reaction corps

RRF

Ready Reserve Force or Ready Reserve Fleet

RRR

Rapid runway repair

Rs.

reis, rupees

RSADF

Royal Saudi Air Defense Force

RSAF

Royal Saudi Air Force

RSCAAL

Remote Sensing Chemical Agent Alarm

RSDU

radar/sonar display unit

RSFSR

Russian Socialist Federated Soviet Republic

RSLF

Royal Saudi Land Force

RSLS

receiver sidelobe suppression

RSME

Royal School of Military Engineering

RSRE

Royal Signals and Radar Establishment (UK)

RSTA

Reconnaissance, surveillance and target acquisition

RSU

Remote Status Unit

RSVP

rotating surveillance vehicle platform

RT

radiotelephone

rt.

right

RTE

Rail transfer equipment

rte.

route

RTFL

Rough terrain forklift

RTNEPH

Real-Time Nephanalysis

RTTY

Radioteletype

Ru.

(Chem.) ruthenium

Rum.

Rumania, Rumanian

Russ.

Russia, Russian

RV

re-entry vehicle

RV

Revised Version(of the Bible)

RVR

Runway visual range.

RW

Reconnaissance Wing

RWI

Radio Wire Integration

RWR

Radar Warning Receiver

Rwy. or ry.

railway

RX

receive