What should pilots departing VFR do if a mandatory frequency (MF) is in use?

When pilots are departing VFR from an area where a mandatory frequency (MF) is in use, the appropriate procedure is to monitor the frequency until clear of the area. This is essential because mandatory frequencies are designated to enhance safety in specific zones where traffic may be uncoordinated or not under radar control.

By monitoring the MF, pilots can gain situational awareness of other aircraft in the vicinity, receive important information, and ensure that they are making their departure in coordination with the activities of others. This practice fosters communication among pilots, helping to avoid potential conflicts during takeoff or departure.

Choosing to change to a different frequency would mean losing valuable situational awareness that could otherwise be gained from monitoring the MF. Broadcasting a departure announcement is a good practice, but it does not replace the necessity of continuous monitoring of the frequency while still in the area. Contacting ATC might also be unnecessary unless specific assistance or instructions are required, and this action could take time away from keeping aware of other traffic on the MF. Therefore, maintaining vigilance by monitoring the frequency is critical for safe operations in areas with an MF in use.