AIM

8/15/19

2

−

1

−

13

Airport Lighting Aids

FIG 2

−

1

−

14

Taxiway Lead

−

On Light Configuration

TBL 2

−

1

−

1

Runways With Approach Lights

Lighting System

No. of Int.

Steps

Status During 
Nonuse Period

Intensity Step Selected Per No. of Mike Clicks

3 Clicks

5 Clicks

7 Clicks

Approach Lights (Med. Int.)

2

Off

Low

Low

High

Approach Lights (Med. Int.)

3

Off

Low

Med

High

MIRL

3

Off or Low

u

u

u

HIRL

5

Off or Low

u

u

u

VASI

2

Off

L

L

L

NOTES

:

u

Predetermined intensity step.

L

Low intensity for night use. High intensity for day use as determined by photocell control.

TBL 2

−

1

−

2

Runways Without Approach Lights

Lighting System

No. of Int.

Steps

Status During

Nonuse Period

Intensity Step Selected Per No. of Mike Clicks

3 Clicks

5 Clicks

7 Clicks

MIRL

3

Off or Low

Low

Med.

High

HIRL

5

Off or Low

Step 1 or 2

Step 3

Step 5

LIRL

1

Off

On

On

On

VASI

L

2

Off

u

u

u

REIL

L

1

Off

Off

On/Off

On

REIL

L

3

Off

Low

Med.

High

NOTES

:

u

 Low intensity for night use. High intensity for day use as determined by photocell control.

L

 The control of VASI and/or REIL may be independent of other lighting systems.