AIM ¶ 4-1-17 — Radar Assistance to VFR
AIM 4-1-17 explains how ATC provides radar vectors and navigation assistance to VFR aircraft, pilot responsibilities, and limitations of the service.
In Plain English
AIM 4-1-17 describes how FAA radar facilities can provide radar assistance and vectors to VFR aircraft, but only when the aircraft can communicate with the facility, is within radar coverage, and can be radar identified.
Key points every student pilot should know:
- ATC vectors are advisory only — they do not authorize you to violate the CFRs (such as VFR cloud clearances or minimum altitudes).
- The pilot in command remains responsible for safely flying the aircraft, including avoiding IMC.
- Controllers often cannot tell if a vector will lead you into clouds. Keep ATC advised of current and forecast weather along your route.
- Controllers may initiate vectors when: the controller suggests it and the pilot concurs, a special advertised program is in effect, or the controller judges it necessary for safety.
- Pilots may request radar navigation assistance, but workload, traffic, radar limits, or frequency congestion may prevent the controller from providing it. That decision is at the controller's sole discretion and is not subject to question.
Operationally, this service is a great safety tool — but it never relieves you of PIC duties.
AIM Source Text
FAA AIM ¶ 4-1-17Radar equipped FAA ATC facilities provide radar assistance and navigation service (vectors) to VFR aircraft provided the aircraft can communicate with the facility, are within radar coverage, and can be radar identified. Pilots should clearly understand that authorization to proceed in accordance with such radar navigational assistance does not constitute authorization for the pilot to violate CFRs. In effect, assistance provided is on the basis that navigational guidance information issued is advisory in nature and the job of flying the aircraft safely, remains with the pilot. In many cases, controllers will be unable to determine if flight into instrument conditions will result from their instructions. To avoid possible hazards resulting from being vectored into IFR conditions, pilots should keep controllers advised of the weather conditions in which they are operating and along the course ahead. Radar navigation assistance (vectors) may be initiated by the controller when one of the following conditions exist: The controller suggests the vector and the pilot concurs. A special program has been established and vectoring service has been advertised. In the controller's judgment the vector is necessary for air safety. Radar navigation assistance (vectors) and other radar derived information may be provided in response to pilot requests. Many factors, such as limitations of radar, volume of traffic, communications frequency, congestion, and controller workload could prevent the controller from providing it. Controllers have complete discretion for determining if they are able to provide the service in a particular case. Their decision not to provide the service in a particular case is not subject to question.
Read the AIM? Now prove it
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1/5
You are flying VFR in Class E airspace at 8,500 feet MSL during the day. What are your minimum visibility and cloud clearance requirements?
PPL5 sample questions — in the app, the drill engine covers 88 PPL topics and every answer cites its source
Oral Exam Questions a DPE Might Ask
Q1What three conditions must be met for ATC to provide radar assistance to a VFR aircraft?
Per AIM 4-1-17, the aircraft must be able to communicate with the facility, be within radar coverage, and be radar identified.
Q2If ATC vectors a VFR aircraft into IMC, who is responsible?
Per AIM 4-1-17, the pilot remains responsible for flying the aircraft safely. Vectors are advisory only and do not authorize a CFR violation. Pilots should keep controllers advised of weather conditions to avoid being vectored into IFR conditions.
Q3Under what circumstances may a controller initiate radar vectors for a VFR aircraft?
Per AIM 4-1-17, a controller may initiate vectors when the controller suggests it and the pilot concurs, when a special advertised vectoring program exists, or when the controller judges the vector necessary for air safety.
Related Paragraphs in Chapter 4
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