Please read the following table in HTML format from a webpage and then answer the question in detail according to the table. Each table cell is defined by a <td> and a </td> tag. Each table row starts with a <tr> and ends with a </tr> tag. 'rowspan=m' and 'colspan=n' represents a cell spaning over 'm' rows and 'n' columns.

Webpage title:
NOAA Weather Radio
Table title:
Radio frequencies used
Table:
<table id='hittask' contenteditable='False'>
<tr> <th colspan=1 rowspan=1 > Official name </th><th colspan=1 rowspan=1 > Frequency </th><th colspan=1 rowspan=1 > Marine Channel </th><th colspan=1 rowspan=1 > Public Alert Channel </th></tr>
<tr> <td class="highlighted"  colspan=1 rowspan=1 > WX1 </td><td class="highlighted"  colspan=1 rowspan=1 > 162.550 MHz </td><td colspan=1 rowspan=1 > 39B </td><td colspan=1 rowspan=1 > 7 </td></tr>
<tr> <td class="highlighted"  colspan=1 rowspan=1 > WX2 </td><td class="highlighted"  colspan=1 rowspan=1 > 162.400 MHz </td><td colspan=1 rowspan=1 > 36B </td><td colspan=1 rowspan=1 > 1 </td></tr>
<tr> <td class="highlighted"  colspan=1 rowspan=1 > WX3 </td><td class="highlighted"  colspan=1 rowspan=1 > 162.475 MHz </td><td colspan=1 rowspan=1 > 97B </td><td colspan=1 rowspan=1 > 4 </td></tr>
<tr> <td colspan=1 rowspan=1 > WX4 </td><td colspan=1 rowspan=1 > 162.425 MHz </td><td colspan=1 rowspan=1 > 96B </td><td colspan=1 rowspan=1 > 2 </td></tr>
<tr> <td colspan=1 rowspan=1 > WX5 </td><td colspan=1 rowspan=1 > 162.450 MHz </td><td colspan=1 rowspan=1 > 37B </td><td colspan=1 rowspan=1 > 3 </td></tr>
<tr> <td colspan=1 rowspan=1 > WX6 </td><td colspan=1 rowspan=1 > 162.500 MHz </td><td colspan=1 rowspan=1 > 38B </td><td colspan=1 rowspan=1 > 5 </td></tr>
<tr> <td colspan=1 rowspan=1 > WX7 </td><td colspan=1 rowspan=1 > 162.525 MHz </td><td colspan=1 rowspan=1 > 98B </td><td colspan=1 rowspan=1 > 6 </td></tr>
<tr> <td colspan=1 rowspan=1 > WX8 </td><td colspan=1 rowspan=1 > 161.650 MHz </td><td colspan=1 rowspan=1 > 21B </td><td colspan=1 rowspan=1 >  </td></tr>
<tr> <td colspan=1 rowspan=1 > WX9 </td><td colspan=1 rowspan=1 > 161.775 MHz </td><td colspan=1 rowspan=1 > 83B </td><td colspan=1 rowspan=1 >  </td></tr>
<tr> <td colspan=1 rowspan=1 > WX10 </td><td colspan=1 rowspan=1 > 163.275 MHz </td><td colspan=1 rowspan=1 > 113B </td><td colspan=1 rowspan=1 >  </td></tr>
</table>
Question:
How broad was the range of frequencies of WX1-3 used by NOAA Weather Radio?
Answer:
WX1 162.55 MHz was the first frequency, then WX2 162.4 and WX3 162.475 were used by NOAA Weather Radio.