Why is it critical to communicate with the tower controller while driving in the CMA?

It is vital to communicate with the tower controller while driving in the Controllable Movement Area (CMA) primarily to ensure safety and coordination with aircraft operations. The CMA is an area where aircraft are actively taxiing, and proper communication helps maintain an awareness of all ongoing operations. Having constant communication ensures that any vehicle movements do not interfere with aircraft that are taxiing, taking off, or landing.

This coordination is crucial because any unexpected interaction between vehicles and aircraft can lead to dangerous situations or incidents on the airfield. The tower controller is in a position to provide real-time information about aircraft movements and can guide vehicle operators to prevent collisions and ensure smooth operations. Overall, effective communication enhances the safety of everyone involved in the airfield operations.