Aviation abbreviations

Abbreviation

Term

AC

Air condition

A/C

Air craft

AD

Airworthiness directive

ADF

Automatic direction finder

A&E

Airframe and engine

Alc

Alcohol (as in alc.prop)

AP

Auto(matic) pilot

ATS

Automatic throttle system

ASI

Airspeed indicator

360CH

360 channel radio

720CH

720 channel radio

CG

Centre of gravity

CHT

Cylinder head temperature

Comm/COM

Communications

Cont

Continental (eng)

CS

Constant speed propeller

DG

Directional gyro

DME

Distance measuring equipment

EGT

Exhaust gas temperature

ELT

Emergency locator transmitter

Enc Alt

Encoding altimeter

FBO

Fixed base operation

FD

Flight director

FREMAN, FREM

Factory remanufacture

GEM

Graphic engine monitoring

GPH

Gallons per hour

GR

Glide ratio

GS

Glideslope

hp

Horsepower

HSI

Horizontal situation indicator

IFR

Instrument flight rules

ILS

Instrument landing system

3LMB/MB

3 light marker beacon

LOC

Localizer

LRF

Long range fuel (capacity)

Lyc

Lycoming (engine)

MB

See 3LMB

MK

Mark (model of equipment)

MPH

Miles per hour

NAV

Navigation

NAV/COM

Navigation/communications

NDB

Non-directional beacon

NDH

No damage history

OAT

Outside air temperature

OBO

Or  best offer

O/Oxy

Oxygen

P&W

Pratt and Whitney (engine)

RMI

Radio magnetic indicator

RNAV

Area navigation

SCTOH

Since chrome top overhaul

SCMOH

Since chrome major overhaul

SFREMAN/SFRM

Since factory remanufacture

SMOH

Since major overhaul

SPOH

Since prop overhaul

STC

Supplemental type certificate

STOH

Since top overhaul

STOL

Short take off and landing

T&B

Turn and bank

TBI

Turn and bank indicator

TBO

Time between overhauls

TT

Total time

TTAE or TTE

Total time aircraft engine

TTAF or TTA

Total time aircraft frame

TTSN

Total time since new

VFR

Visual flight rules

VHF

Very high frequency

VOR

Very high frequency Omni-Range

Xpdr

Transponder