For US student pilots
Special VFR clearance: when you can ask, and what to say
The field is reporting two miles in haze, the cloud base is legal, and you are ten minutes from home. Special VFR is the clearance that lets a VFR pilot into or out of a surface area when the weather is below basic VFR minimums. It has hard limits, it has to be asked for, and the controller has to fit you around the IFR traffic. Here is how it works on the radio.
What it is
A clearance to enter, leave or operate within a Class B, C, D or E surface area when the weather is less than basic VFR, traffic permitting and provided it does not delay IFR operations (AIM 4-4-6 a; P/CG SPECIAL VFR OPERATIONS). Most Class D and E surface areas allow it; only some Class B and C do. It must be requested by the pilot and approved by ATC.
The limits
For an airplane: remain clear of clouds; at least one statute mile flight visibility inside the surface area; and at least one statute mile ground visibility to take off or land, or flight visibility if ground visibility is not reported (AIM 4-4-6 a 1, a 2). At night, Special VFR for an airplane additionally requires an instrument rating and an IFR-equipped aircraft under 14 CFR 91.157, which is why it is mostly a daytime tool for students.
Who to ask
Where a tower sits inside the surface area, ask the tower. In a Class E surface area with no tower, ask the nearest tower, Flight Service or Center (AIM 4-4-6 b).
What to say
You do not need to file a flight plan, but state your intentions in enough detail for the controller to fit you into the flow (AIM 4-4-6 c): position, altitude, what you want to do, and the words “request Special VFR”.
Livermore Tower, Cessna Three One Six Zero Foxtrot, eight miles east, one thousand five hundred, with Information Hotel, request Special VFR into Livermore, landing.
Palo Alto Ground, Cessna Six Zero Foxtrot, at the ramp with Information Alpha, request Special VFR out of the Class Delta to the south.
What the clearance sounds like
It will not contain an altitude, because you must stay clear of clouds yourself; the controller may cap you at or below an altitude for other traffic, and at radar locations may vector you (AIM 4-4-6 c). Obstacle and terrain clearance stay with you (c note). Read back the clearance and any altitude restriction with your call sign.
Cessna Six Zero Foxtrot, Livermore Tower, cleared into the Class Delta surface area, Special VFR, maintain Special VFR conditions at or below one thousand five hundred, report two mile final runway two five left.
Cleared into the Delta, Special VFR, at or below one thousand five hundred, report two mile final two five left, Cessna Six Zero Foxtrot.
“Expect delay”
IFR aircraft come first. If a Special VFR clearance cannot be granted because of IFR traffic the controller tells you the anticipated delay, “expect one five minutes delay”, and will not give a time to expect further clearance (JO 7110.65 7-5-2 a, b). Hold outside the surface area in legal conditions, or go somewhere else.
Where it stops
Special VFR applies within the surface area only. Once you leave it ATC provides no separation, and the airspace outside needs basic VFR minimums or Class G rules (AIM 4-4-6 d). A Special VFR departure into a mile of visibility with nowhere legal to go afterwards is not a plan.
Airspace classes & what you must do on the radio
US airspace is by class. The radio requirement rises with the class. [AIM chapter 3; 4-3-2; 4-4-6]
- Class B
- A clearance is required: you must hear “cleared into the Class Bravo” before entering. Expect a squawk first and “remain clear” until cleared. Mode C transponder within 30 miles of the primary airport.
- Class C
- Two-way radio communication with the approach control must be established before entry — a reply that uses your call sign. A transponder with altitude reporting is required.
- Class D
- Two-way communication with the tower before entering the surface area; initial call about 15 miles out. “Aircraft calling, stand by” does NOT establish communication — remain outside. [AIM 4-3-2 a]
- Class E surface area
- No radio requirement in VFR conditions; a Special VFR clearance below basic VFR.
- Special VFR
- A clearance to operate in a surface area below VFR minima: clear of clouds, at least 1 statute mile. Request it from the tower where there is one; state your intentions in enough detail to fit the traffic. [AIM 4-4-6]
NorCal Approach, Cessna One Seven Two Sierra Papa, one two miles south of Palo Alto, three thousand five hundred, request Class Bravo transition to San Carlos.
Acknowledging & reading back
Acknowledge every call-up and clearance with your identification — at the start or the end — and one of the standard words. [AIM 4-2-3 c]
- Wilco
- Received, understood, will comply. [P/CG]
- Roger
- Received all of your last transmission. Never an answer to a yes/no question. [P/CG]
- Affirmative / Negative
- Yes / No. [P/CG]
- Unable
- Cannot comply with the instruction. Say what you can do instead. [P/CG]
- Say again
- Repeat — “say again all after (fix)”. [P/CG]
- Stand by
- A pause, not an approval or a denial. Call again if the wait is long. [P/CG]
What must be read back
- Runway assignments
- The runway, including left/right/center, in the first readback of a taxi, departure or landing clearance. [AIM 4-4-7 b 4]
- Hold-short instructions
- Word for word. ATC is required to obtain this readback. [AIM 4-3-18 a 9, 10]
- Any clearance to enter a runway
- Line up and wait, cross runway (number), cleared for takeoff. [AIM 4-3-18 a 9]
- Altitudes, vectors, altitude restrictions
- In the sequence given, with your identification. [AIM 4-4-7 b 2]
- Squawk codes and frequency changes
- Read back the code; acknowledge the frequency. [AIM 4-2-3 d]
- Not read back
- Wind, traffic information, weather — acknowledged, never required.
November Five Charlie Tango, roger, cleared to land runway nine left.
Runway three six left, taxi via Alpha, hold short of taxiway Charlie, Cessna Six Zero Foxtrot.
Ask for Special VFR from a tower that answers
TowerTalk's Exercise E works services and airspace requests with an AI controller at a real US airport, using today's real weather, graded with the AIM paragraph.
Related
Study aid, written in our own words from the FAA Aeronautical Information Manual (Change 3, 7/9/26) and the Pilot/Controller Glossary, with paragraph references so you can check each point. Last reviewed 10 September 2026; awaiting review by a US flight instructor. It does not reproduce those documents and is not a substitute for them — always defer to the AIM, the current FAA publications, your instructor and your examiner. TowerTalk is not approved or endorsed by the FAA.