What are Peripheral Air-Ground Links (PALs) used for?

Peripheral Air-Ground Links (PALs) are utilized primarily for remote communications with aircraft. This system enables effective interaction between air traffic control and aircraft in areas where traditional communication tools may be limited or ineffective. It enhances the safety and efficiency of air traffic management by allowing timely and clear exchanges of information, which can include messaging about flight plans, operational instructions, and emergency communications.

The option highlighting radar coverage pertains more to surveillance capabilities rather than communication. Managing ground traffic involves the movement of vehicles on the ground rather than direct communication links with aircraft. Monitoring airspeed is a function related to the cockpit instruments and performance parameters of the aircraft, focusing specifically on the aircraft's flight characteristics rather than communication systems. Thus, the correct answer highlights the core purpose of PALs in facilitating vital communication for flight operations.