The Hydrologic Radio Frequency
Licensing Guide

The Federal hydrologic frequencies (in MHz) available for use through the ULS are the following:

 

169.4250 169.4375 169.4500 169.4625 169.4750 169.4875 169.5000 169.5125 169.5250

170.2250 170.2375 170.2500 170.2625 170.2750 170.2875 170.3000 170.3125 170.3250

171.0250 171.0375 171.0500 171.0625 171.0750 171.0875 171.1000 171.1125 171.1250

171.8250 171.8375 171.8500 171.8625 171.8750 171.8875 171.9000 171.9125 171.9250

406.125 406.175

412.6625 412.6750 412.6875 412.7125 412.7250 412.7375 412.7625 412.7750

415.1250 415.1750