UNIT 0: Controller Fundamentals & Radio Technique

Lesson 0.1: Controller Mindset

ATC is not about talking fast. It is about keeping an accurate mental picture, making safe decisions early, and communicating those decisions clearly.

A good controller constantly answers four questions:

1. Where is every aircraft now?
2. Where is each aircraft going next?
3. Which aircraft can conflict if nothing changes?
4. What instruction solves the problem with the least confusion?

Every instruction should be:

• Safe: It preserves separation and runway protection.
• Clear: The pilot can understand it on the first read.
• Complete: It includes the required limit, route, altitude, heading, speed, or clearance.
• Timely: It is issued early enough that the pilot can comply.
• Coordinated: Other controllers know what you are sending them.

Lesson 0.2: Core Tools and Setup

Before controlling, prepare your workspace. Know your airport layout, active runway, preferred taxi routes, local SIDs, STARs, fixes, and frequencies. Keep a strip or list for every aircraft, and mark aircraft status immediately after each instruction. Listen before transmitting, and correct readback errors immediately.

Basic Strip Data: Every controlled aircraft should have at least:

• Callsign (e.g., AAL123)
• Aircraft type (e.g., A320)
• Flight rules (IFR/VFR)
• Departure/arrival airport
• Route/SID/STAR
• Cleared altitude
• Squawk
• Current instruction (Prevents duplicate instructions)
• Next controller (Supports clean handoff)

Readback Items You Must Hear: Always verify the pilot correctly reads back: Callsign, Runway assignment, Hold short instruction, Takeoff or landing clearance, Cleared altitude, Heading, Speed restriction, Squawk code, Route/SID, and Frequency change.

If a readback is wrong, correct it immediately:

"AAL123, negative. Cleared altitude is five thousand, read back five thousand."

Lesson 0.3: Radio Technique

Standard Transmission Order Use this basic order:

1. Callsign
2. Instruction
3. Restriction or condition
4. Frequency or handoff, if needed

Example: "AAL123, taxi to runway 25R via Alpha, Bravo, hold short runway 25R."

Speak Clearly

• Use standard phraseology where possible. Avoid long explanations on frequency.
• Split complex instructions into smaller parts.
• Do not issue an instruction until you know what you want the aircraft to do.
• Never assume silence means compliance.

Correction Format When correcting yourself:

"AAL123, correction, taxi to runway 25R via Alpha, Charlie, hold short runway 25R."

When correcting the pilot:

"AAL123, readback correct except squawk. Squawk 4272."

Frequency Discipline Do not block the frequency with training commentary. If a pilot needs help, give the operational instruction first, then clarify only if necessary.

• Good: "DAL456, hold position. Traffic crossing left to right."
• Bad: "DAL456, wait a second because I have another aircraft and I am not sure if you can go yet."