ATSA Air Controller Knowledge 4 — Questions and Answers
Question 1: What is the definition of 'conflict alert' in ATC radar systems?
- A warning that an aircraft is approaching controlled airspace without a clearance
- An automated warning that two aircraft are predicted to violate separation minima (Correct answer)
- A notification that an aircraft has declared an emergency
- An alert that an aircraft has deviated from its assigned altitude
Correct answer: An automated warning that two aircraft are predicted to violate separation minima
Conflict alert is an automated radar function that warns controllers when two tracked aircraft are predicted to lose required separation.
Question 2: During a ground stop, which aircraft are typically exempt from holding?
- VFR aircraft departing the affected airport
- Aircraft already airborne diverting to an alternate
- Aircraft that declared a fuel emergency (Correct answer)
- All international flights
Correct answer: Aircraft that declared a fuel emergency
Aircraft declaring a fuel emergency are prioritized for landing regardless of ground stop or flow programs.
Question 3: What is the purpose of a LAHSO (Land and Hold Short Operations) clearance?
- To authorize simultaneous use of intersecting runways while maintaining separation (Correct answer)
- To expedite departure release in low visibility conditions
- To allow aircraft to bypass the hold-short line for taxi purposes
- To reduce noise over noise-sensitive areas
Correct answer: To authorize simultaneous use of intersecting runways while maintaining separation
LAHSO allows controllers to land aircraft on intersecting runways simultaneously by requiring aircraft to hold short of the intersection.
Question 4: A controller notices two aircraft on radar are converging at the same altitude. The first action should be to:
- Notify the supervisor and wait for instructions
- Issue a traffic alert and coordinate with the adjacent sector
- Issue an immediate altitude change or turn to one or both aircraft to resolve the conflict (Correct answer)
- Declare an emergency on behalf of the aircraft
Correct answer: Issue an immediate altitude change or turn to one or both aircraft to resolve the conflict
The controller's first priority is to issue an immediate clearance to resolve the conflict and restore separation.
Question 5: What does 'IMC' stand for and how does it affect ATC responsibilities?
- Instrument Meteorological Conditions; ATC is responsible for all separation (Correct answer)
- Initial Move Clearance; ATC must coordinate with the destination airport
- Integrated Monitoring Configuration; ATC must activate backup radar
- International Military Corridor; ATC hands off to military control
Correct answer: Instrument Meteorological Conditions; ATC is responsible for all separation
IMC means Instrument Meteorological Conditions, where visibility is too low for visual flight and ATC must provide all IFR separation.
Question 6: An aircraft on an IFR flight plan in controlled airspace requests a visual approach. What is required?
- The pilot must cancel IFR and file a new VFR flight plan
- The airport must be VFR and the pilot must have the airport or preceding traffic in sight (Correct answer)
- The aircraft must be within 10 miles of the airport at all times
- ATC must receive approval from the ARTCC before issuing the clearance
Correct answer: The airport must be VFR and the pilot must have the airport or preceding traffic in sight
A visual approach requires the airport to be VFR and the pilot to have either the airport or preceding traffic in sight.
Question 7: What is a 'handoff' in ATC operations?
- Physically transferring radar screens between controllers
- The transfer of radar identification and communications responsibility from one controller to another (Correct answer)
- A pilot's switch from tower to approach frequency
- The process of issuing a new IFR clearance when passing a fix
Correct answer: The transfer of radar identification and communications responsibility from one controller to another
A handoff transfers radar identification and communication responsibility for an aircraft from one controller position to another.
ATSA Air Controller Knowledge 4
What is the definition of 'conflict alert' in ATC radar systems?