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07. Transmission of numbers in radiotelephony

Revision for “07. Transmission of numbers in radiotelephony” created on February 12, 2019 @ 01:46:58

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07. Transmission of numbers in radiotelephony
<strong>5.2.1.4 Transmission of numbers in radiotelephony</strong>
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<td><strong>5.2.1.4.1 Transmission of numbers</strong>
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<td><strong>5.2.1.4.1.1</strong> All numbers, except as prescribed in 5.2.1.4.1.2, shall be transmitted by pronouncing each digit separately.<strong>Note.</strong>
<ul>The following examples illustrate the application of this procedure (see 5.2.1.4.3.1 for pronunciation).</ul>
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<th>aircraft call signs</th>
<th>transmitted as</th>
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<td>CCA 238</td>
<td>Air China <strong>two three eight</strong></td>
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<td>OAL 242</td>
<td>Olympic <strong>two four two</strong></td>
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<th>flight levels</th>
<th>transmitted as</th>
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<td>FL 180</td>
<td>FL 200</td>
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<td>flight level <strong>one eight zero</strong></td>
<td>flight level <strong>two zero zero</strong></td>
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<th>headings</th>
<th>transmitted as</th>
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<td>100 degrees</td>
<td>heading <strong>one zero zero</strong></td>
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<td>080 degrees</td>
<td>heading <strong>zero eight zero</strong></td>
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<th>wind direction and speed</th>
<th>transmitted as</th>
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<td>200 degrees 70 knots</td>
<td>wind <strong>two zero zero</strong> degrees <strong>seven zero</strong> knots</td>
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<td>160 degrees 18 knots gusting 30 knots</td>
<td>wind <strong>one six zero</strong> degrees <strong>one eight</strong> knots gusting three zero knots</td>
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<th>transponder codes</th>
<th>transmitted as</th>
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<td>2 400</td>
<td>squawk <strong>two four zero zero</strong></td>
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<td>4 203</td>
<td>squawk <strong>four two zero three</strong></td>
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<th>runway/th&gt;</th>
<th>transmitted as</th>
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<td>27</td>
<td>runway <strong>two seven</strong></td>
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<td>30</td>
<td>runway <strong>three zero</strong></td>
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<th>altimeter setting</th>
<th>transmitted as</th>
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<td>1 010</td>
<td>QNH <strong>one zero one zero</strong></td>
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<td>1 000</td>
<td>QNH <strong>one zero zero zero</strong></td>
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<td><strong>5.2.1.4.1.2 </strong>All numbers used in the transmission of altitude, cloud height, visibility and runway visual range (RVR) information, which contain whole hundreds and whole thousands, shall be transmitted by pronouncing each digit in the number of hundreds or thousands followed by the word HUNDRED or THOUSAND as appropriate. Combinations of thousands and whole hundreds shall be transmitted by pronouncing each digit in the number of thousands followed by the word THOUSAND followed by the number of hundreds followed by the word HUNDRED.<strong>Note.</strong>
<ul>
<li style="list-style-type: none">
<ul>The following examples illustrate the application of this procedure. See</ul>
</li>
</ul>
<a title="07. Transmission of numbers in radiotelephony" href="http://flightcrewguide.com/wiki/communications/07-transmission-numbers-radiotelephony/">5.2.1.4.3.1 (Pronunciation of numbers)</a>
<ul>for pronunciation).</ul>
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<th>altitude</th>
<th>transmitted as</th>
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<td>800</td>
<td><strong>eight hundred</strong></td>
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<td>3 400</td>
<td><strong>three thousand four hundred</strong></td>
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<td>12 000</td>
<td><strong>one two thousand</strong></td>
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<th>cloud height</th>
<th>transmitted as</th>
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<td>2 200</td>
<td><strong>two thousand two hundred</strong></td>
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<td>4 300</td>
<td><strong>four thousand three hundred</strong></td>
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</table>
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<th>visibility</th>
<th>transmitted as</th>
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<td>1 000</td>
<td>visibility <strong>one thousand</strong></td>
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<td>700</td>
<td>visibility <strong>seven hundred</strong></td>
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<th>runway visual range</th>
<th>transmitted as</th>
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<td>600</td>
<td>RVR <strong>six hundred</strong></td>
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<td>1 700</td>
<td>RVR <strong>one thousand
seven hundred</strong></td>
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</td>
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<td><strong>5.2.1.4.1.3</strong> Numbers containing a decimal point shall be transmitted as prescribed in 5.2.1.4.1.1 with the decimal point in appropriate sequence being indicated by the word DECIMAL.<strong>Note 1.</strong>
<ul>The following examples illustrate the application of this procedure:</ul>
<table>
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<th>Number</th>
<th>Transmitted as</th>
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<td>100.3</td>
<td>ONE ZERO ZERO DECIMAL THREE</td>
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<td>38 143.9</td>
<td>THREE EIGHT ONE FOUR THREE DECIMAL NINE</td>
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<strong>Note 2.</strong>
<ul>
<li style="list-style-type: none">
<ul>For identification of VHF frequencies the number of digits used after the decimal point are determined on the basis of the channel spacing (</ul>
</li>
</ul>
<a title="11. Radiotelephony procedures" href="http://flightcrewguide.com/wiki/communications/radiotelephony-procedures/">5.2.1.7.3.4.3</a>
<ul>
<li style="list-style-type: none">
<ul>refers to frequencies separated by 25 kHz,</ul>
</li>
</ul>
<a title="11. Radiotelephony procedures" href="http://flightcrewguide.com/wiki/communications/radiotelephony-procedures/">5.2.1.7.3.4.4</a>
<ul>
<li style="list-style-type: none">
<ul>refers to frequencies separated by 8.33 kHz).</ul>
</li>
</ul>
<strong>Note 3.</strong>
<ul>The channelling/frequency pairing relationship for 8.33 kHz and 25 kHz is found in Table 4-1 (bis), Volume V.</ul>
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<td><strong>5.2.1.4.1.4 PANS.</strong> When transmitting time, only the minutes of the hour should normally be required. Each digit should be pronounced separately. However, the hour should be included when any possibility of confusion is likely to result.<strong>Note.</strong>
<ul>The following example illustrates the application of this procedure when applying the provisions of 5.2.1.2.2:</ul>
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<th>Time</th>
<th>Statement</th>
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<td>0920 (9:20 A.M.)</td>
<td>TOO ZE-RO or
ZE-RO NIN-er TOO ZE-RO</td>
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<td>1643 (4:43 P.M.)</td>
<td>FOW-er TREE or
WUN SIX FOW-er TREE</td>
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<td><strong><strong>5.2.1.4.2 Verification of numbers</strong></strong>5.2.1.4.2.1

When it is desired to verify the accurate reception of numbers the person transmitting the message shall request the person receiving the message to read back the numbers.</td>
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<td><strong>5.2.1.4.3 Pronunciation of numbers</strong>

When the provisions of 5.2.1.2.2 (see below) are applied, numbers shall be transmitted using the following pronunciation:
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<th>Numeral or numeral element</th>
<th>Pronunciation</th>
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<td>0</td>
<td>ZE-RO</td>
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<td>1</td>
<td>WUN</td>
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<td>2</td>
<td>TOO</td>
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<td>3</td>
<td>TREE</td>
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<td>4</td>
<td>FOW-er</td>
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<td>5</td>
<td>FIFE</td>
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<td>6</td>
<td>SIX</td>
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<td>7</td>
<td>SEV-en</td>
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<td>8</td>
<td>AIT</td>
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<td>9</td>
<td>NIN-er</td>
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<td>Decimal</td>
<td>DAY-SEE-MAL</td>
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<td>Hundred</td>
<td>HUN-dred</td>
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<td>Thousand</td>
<td>TOU-SAND</td>
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<strong>Note.</strong>
<ul>The syllables printed in capital letters in the above list are to be stressed; for example, the two syllables in ZE-RO are given equal emphasis, whereas the first syllable of FOW-er is given primary emphasis.</ul>
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Source: ICAO Annex 10.2



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