Numbers

OBJECTIVES:

  • how numbers are pronounced
  • how to use numbers according the situation

Number Pronunciation

These rules have to be followed when using voice mode only.

First of all, some figures and numbers are not pronounced as they usually are :

  • 0 : is pronounced ZERO instead of the letter "O".
  • 3 : is pronounced TREE and not THREE.
  • 9 : second syllable is emphasized, as if there is a final R: NINER.
  • 1000 : is pronounced ONE THOUSAND and not THOUSAND.

 

CHARACTER

MORSE CODE

TELEPHONY

PRONUNCIATION

1

• – – – –

One

(WUN)

2

• • – – –

Two

(TOO)

3

• • • – –

Three

(TREE)

4

• • • • –

Four

(FOW-ER)

5

• • • • •

Five

(FIFE)

6

– • • • •

Six

(SIX)

7

– – • • •

Seven

(SEV-EN)

8

– – – • •

Eight

(AIT)

9

– – – – •

Nine

(NAIN-ER)

0

– – – – –

Zero

(ZEE-RO)

Number Combinations

DO NOT USE “DOUBLE” or “TRIPPLE” when a number repeats itself! Pronounce EACH DIGIT SEPARATELY !

example

not correct

correct

99

Double Niner

Niner Niner

777

Tripple Seven

Seven Seven Seven

DO NOT SAY: “TEN”, "TWENTY" !!

The only exception is when giving TRAFFIC INFORMATION. IT IS THE ONLY SITUATION,
WHERE YOU MUST USE TEN, ELEVEN or TWELVE O'CLOCK

10

One Zero

20

Two Zero

100

One Zero Zero

One Hundred

200

Two Zero Zero

Two Hundred

1000

One Zero Zero Zero

One Thousand

2000

Two Zero Zero Zero

Two Thousand

10000

One Zero Thousand

100000

One Hundred Thousand

99

Niner Niner

777

Seven Seven Seven

Use the word “DECIMAL” in numbers containing a decimal point

118.250

one one eight DECIMAL two five zero

83052.7

eight three zero five two DECIMAL seven

France: the word “DECIMAL” may be skipped if there is no confusion.

Frequency

  • Use “DECIMAL” in numbers containing a decimal point
  • Always pronounce each digit separately
  • Pronounce all 6 digits, except if the frequency ends as - 00, then pronounce first 4
  • Always pronounce the first number after the decimal point, even if it is a zero

118.250

one one eight DECIMAL two five zero

120.600

one two zero DECIMAL six

121.875

one two one DECIMAL eight seven five

132.000

one three two DECIMAL ZERO

Callsigns

  • Always pronounce each digit separately
  • More details about callsigns later on

 

EIN631

SHAMROCK SIX THREE ONE

DAT77F

ESTAIL SEVEN SEVEN foxtrot

TUB111

BEAUTY ONE ONE ONE

Australia: Call signs containing FLIGHT NUMBERS are transmitted in GROUP FORM,
e.g.. CATHAY TWENTY-SIX FORTY-ONE

Headings

  • Always pronounce each digit separately

NEVER say “HUNDRED”

Heading 060

Heading ZERO SIX ZERO

Heading 100

Heading ONE ZERO ZERO

Heading 190

Heading ONE NINER ZERO

Heading 360

Heading THREE SIX ZERO

Wind Direction and Speed

  • Always pronounce each digit separately
  • Never say "HUNDRED"

Always round wind direction to the nearest tenth !

100/11

100 degrees 11 knots

wind ONE ZERO ZERO degrees ONE ONE knots

097/11

100 degrees 11 knots

wind ONE ZERO ZERO degrees ONE ONE knots

193/18

190 degrees 18 knots

wind ONE NINER ZERO degrees ONE EIGHT knots

050/18G25

050 degrees 18 knots gusting 25

wind ZERO FIVE ZERO degrees ONE EIGHT knots gusting TWO FIVE

Transponder Code

  • Always pronounce each digit separately

SQUAWK 3500

Squawk TREE FIVE ZERO ZERO

SQUAWK 4301

Squawk FOUR THREE ZERO ONE

Runways

  • Always pronounce each digit separately

Always pronounce 2 digits !

RUNWAY 25

Runway TWO FIVE

RUNWAY 08

Runway ZERO EIGHT

RUNWAY 25L

Runway TWO FIVE LEFT

RUNWAY 25C

Runway TWO FIVE CENTER

RUNWAY 25R

Runway TWO FIVE RIGHT

RUNWAY 07R

Runway ZERO SEVEN RIGHT

Altimeter Setting

  • Always pronounce each digit separately

NEVER say “ONE THOUSAND”

QFE 1001

QFE ONE ZERO ZERO ONE

QNH 999

QNH NINER NINER NINER

QNH 1000

QNH ONE ZERO ZERO ZERO
  • QNH - pressure at mean sea level
  • QFE - pressure at the station/airport level

Flight Levels

  • Always pronounce each digit separately

FL60

Flight Level SIX ZERO

FL80

Flight Level EIGHT ZERO

FL100

Flight Level ONE ZERO ZERO

FL190

Flight Level ONE NINER ZERO

FL200

Flight Level TWO ZERO ZERO

FL300

Flight Level THREE ZERO ZERO

NEVER say Flight Level "ZERO ... x ... ZERO"

example

not correct

correct

FL100

Flightlevel ONE HUNDRED

Flightlevel ONE ZERO ZERO

FL080

Flightlevel ZERO EIGHT ZERO

Flightlevel EIGHT ZERO

United Kingdom: USE Flight Level “ONE HUNDRED, TWO HUNDRED, … HUNDRED”.

Altitude

Always use "…HUNDRED" or "…THOUSAND" for altitudes

700 FEET

SEVEN HUNDRED Feet

4500 FEET

FOUR THOUSAND FIVE HUNDRED Feet

10000 FEET

ONE ZERO THOUSAND Feet

18000 FEET

ONE EIGHT THOUSAND Feet

Cloud Height

  • always use "…HUNDRED" or "…THOUSAND" for altitudes

3300 FEET

THREE THOUSAND THREE HUNDRED

5900 FEET

FIVE THOUSAND NINER HUNDRED

20000 FEET

TWO ZERO THOUSAND

Visibility

  • always use "…HUNDRED" or "…THOUSAND"

800 METERS

Visibility EIGHT HUNDRED Meters

1000 METERS

Visibility ONE THOUSAND Meters

9999 METERS

Visibility ONE ZERO kilometers OR MORE

Runway Visual Range

  • Always use "…HUNDRED" or "…THOUSAND"
  • During LVP (Low Visibility Procedures) the Runway Visual Range is given

 

400 METERS

RVR FOUR HUNDRED Meters

1100 METERS

RVR ONE THOUSAND ONE HUNDRED Meters
  • When LVP is in progress, the RVR is given for 3 points:
  1. Touchdown zone
  2. Midpoint zone
  3. Stop end zone

RVR 150/250/600

RVR TOUCHDOWN ONE FIVE ZERO Meters, MIDPOINT TWO FIVE ZERO Meters, STOP END SIX HUNDRED Meters

Other Numbers

  • Use “DECIMAL” in numbers containing a decimal point
  • Always pronounce each digit separately

200.5

TWO ZERO ZERO DECIMAL FIVE

83052.7

EIGHT THREE ZERO FIVE TWO DECIMAL SEVEN

648

SIX FOUR EIGHT