When departing VFR from a MF, when should pilots stop monitoring that frequency?

Pilots should continue to monitor the frequency of a MF (mandatory frequency) until they are beyond the specified distance or altitude for a few important reasons. Monitoring the MF ensures that pilots remain aware of any potential traffic conflicts or important communications that may arise during the departure phase.

Maintaining situational awareness is crucial, especially in areas where multiple aircraft may be operating in close proximity. By listening to the MF, pilots can receive information about other traffic, weather updates, or any relevant instructions from other pilots in the vicinity. This practice enhances safety and helps pilots make informed decisions as they transition from the departure area.

In this context, stopping monitoring the frequency prematurely could lead to increased risk of mid-air collisions or missing important communications that pertain to ongoing traffic in the area. Therefore, adhering to the specified distance or altitude guideline ensures that pilots remain vigilant until they are safely clear of the airspace they are departing.