These frequencies are the frequencies that the 49MHz ERC suggests
you use for hobbyist operations. Because the 49MHz band is shared
with military operations, petroleum operations, and the occasional
public safety allocation; it's a good idea to stick to these
frequencies for operations. They're allocated to Personal Radio.

49.8300MHz - Recommended Hobbyist Operations Freq
49.8450MHz
49.8600MHz - Recommended Hobbyist Operations Freq.
49.8750MHz
49.8900MHz