Which two tower positions initiate control instructions?

In air traffic control, the initiation of control instructions is crucial for maintaining safe and efficient operations within the airport environment. The correct relationship between tower positions is found in the roles of Local Control and Ground Control.

Local Control is responsible for managing aircraft movements on active runways and in the airspace immediately surrounding the airport. This position is essential for ensuring safe takeoffs, landings, and sequencing of aircraft in the vicinity of the runway. When an aircraft is cleared for takeoff or instructed to land, it is Local Control that issues these commands based on current traffic conditions.

Ground Control, on the other hand, oversees the movement of aircraft on the ground, specifically on taxiways and other non-runway areas. Ground Control is responsible for issuing clearances for aircraft to taxi to and from runways, gates, and other locations on the airport surface. They play a pivotal role in ensuring that aircraft move safely and efficiently while on the ground, issuing instructions that prevent collisions and maintain flow.

Together, these two positions—Local Control, which manages operations around the active runways, and Ground Control, which handles ground movements—are fundamental to initiating control instructions, ensuring that all operations run smoothly and safely.