Final answer:
Air Traffic Control issues control instructions to avoid interfering operation within ILS critical areas at controlled airports when weather conditions are less than 3 miles.
Step-by-step explanation:
The subject of this question is Air Traffic Control, which falls under the category of Computers and Technology. Air Traffic Control (ATC) issues control instructions to avoid interfering operation within ILS critical areas at controlled airports when weather conditions are less than 3 miles. The ILS (Instrument Landing System) critical area is an area near the runway where the signals from the ILS system could be disrupted by other aircraft. When the weather conditions are less than 3 miles, ATC provides specific control instructions to ensure safe operations.