NOAA Weather Radio
Radio frequencies used

Official name
Frequency
Marine Channel
Public Alert Channel
WX1
162.550 MHz
39B
7
WX2
162.400 MHz
36B
1
WX3
162.475 MHz
97B
4
WX4
162.425 MHz
96B
2
WX5
162.450 MHz
37B
3
WX6
162.500 MHz
38B
5
WX7
162.525 MHz
98B
6
WX8
161.650 MHz
21B
-
WX9
161.775 MHz
83B
-
WX10
163.275 MHz
113B
-

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.