Answer:
Explanation:
Two-way radio communication is required for all flights operating in controlled airspace, which includes most airspace above 2,000 feet MSL (mean sea level). Since both Bishop Airport (area 4) and McCampbell Airport (area 1) are located in controlled airspace, two-way radio communication would be required for a flight between these two airports at an altitude of 2,000 feet MSL.
It is important to note that specific requirements for two-way radio communication may vary based on the type of aircraft, the airspace in which the aircraft is operating, and other factors. Pilots are responsible for ensuring that they have the necessary equipment and are able to maintain two-way radio communication as required by applicable regulations.