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AIM 

6/17/21 

[References are to page numbers] 

Traffic Control Light Signals, 4

3

19 

Traffic Information Service, 4

5

Traffic Information Service (TIS), 4

4

12 

Traffic Information Service

Broadcast , 4

5

19 

Traffic Patterns, 4

3

Transponder Landing System (TLS), 1

1

39 

Transponder Operation 

ADS

B Out Operation, 4

1

15 

Automatic Altitude Reporting, 4

1

16 

Code Changes, 4

1

16 

Emergency, 6

2

Ident Feature, 4

1

16 

Under Visual Flight Rules, 4

1

17 

VFR, 4

1

17 

Tri

Color Visual Approach Slope Indicator, 2

1

TRSA. 

See 

Terminal Radar Service Areas 

Turbulence, Wake, 7

4

Air Traffic Separation, 7

4

Development and New Capabilities, 7

4

Helicopters, 7

4

Pilot Responsibility, 7

4

Vortex Behavior, 7

4

Vortex Generation, 7

4

Vortex Strength, 7

4

TWIP. 

See 

Terminal Weather Information For Pilots 

System 

Ultralight Vehicles, 3

2

Uncontrolled Airports, IFR Clearances, 5

2

Unicom, 4

1

Unidentified Flying Object (UFO) Reports, 7

7

Unmanned Aircraft, 7

6

Urgency, 6

3

VASI. 

See 

Visual Approach Slope Indicator 

VDP. 

See 

Visual Descent Points 

Vector, Radar, 5

5

Vehicle Roadway Markings, 2

3

16 

Vertical Navigation, 5

1

12 

VFR Corridors, 3

5

VFR Flights in Terminal Areas, 4

3

21 

VFR Flyways, 3

5

VFR Military Training Routes, 3

5

VFR Transition Routes, 3

5

VFR

on

Top, 5

5

VHF Omni

directional Range, 1

1

Minimum Operational Network (MON), 1

1

VHF Omni

directional Range/Tactical Air Navigation, 

1

1

Visual 

Approach, 5

4

62, 5

5

Clearing Procedures, 4

4

11 

Glideslope Indicators, 2

1

Separation, 4

4

10, 5

5

Visual Approach Slope Indicator, 2

1

Visual Climb Over Airport, 5

2

Visual Descent Point, 5

4

19 

Visual Meteorological Conditions (VMC), 5

2

VNAV. 

See

 Vertical  Navigation 

VOCA. 

See 

Visual Climb Over Airport 

Void Times, Clearance, 5

2

Volcanic, Ash, 7

6

Volcanic Activity Reporting, Forms. 

See

 Appendix 2 

VOR

See also

 VHF Omni

directional Range 

Receiver Check, 1

1

VOR Receiver Checkpoint Markings, 2

3

16 

VORTAC. 

See

 VHF Omni

directional Range/Tactical 

Air Navigation 

VR. 

See

 VFR Military Training Routes 

Waivers, 4

1

19 

Wake, Turbulence, 7

4

Warning Areas, 3

4

Weather, ICAO, Weather Formats, 7

1

61 

Weather Reconnaissance Area (WRA), 3

5

Weather System Processor (WSP), 4

1

19, 4

3

13, 

7

1

51 

WSP. 

See 

Weather System Processor 

I

12 

Index