Use of SAFETYCOM: Ground Stations
21. There is no ground station associated with SAFETYCOM and no ground stations have been licensed to operate on the frequency. Use of 135.475 MHz is restricted to transmissions from aircraft. However, the phraseology in a small number of transmissions recorded on the frequency, e.g. use of words such as ‘clear’, suggested either incorrect phraseology or the presence of a ground station on the frequency. Pilots must avoid using the word ‘clear’ on SAFETYCOM, as other pilots may understand this, incorrectly, as a clearance.