Final answer:
A controller may issue a safety alert when the aircraft is in a situation that jeopardizes flight safety. Such situations include proximity to terrain, other aircraft, or hazardous weather conditions. Air traffic controllers use safety alerts to guide pilots away from these dangers.
Step-by-step explanation:
A controller may issue a safety alert to an aircraft under his control when that aircraft is in a situation where the safety of flight is in jeopardy. This may include scenarios such as being in close proximity to terrain, other aircraft, or weather-related hazards.
The purpose of the safety alert is to direct the pilot's attention to the potential danger and to assist them in resolving the situation safely. Air traffic controllers play a crucial role in ensuring the safety and efficiency of air navigation, and safety alerts are one of the tools at their disposal to prevent accidents and incidents.