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based on expected visibility conditions. Runways
without approach lighting may provide radio
controlled intensity adjustments of runway edge
lights. Other lighting systems, including VASI, REIL,
and taxiway lights, may be either controlled with the
runway edge lights or controlled independently of the
runway edge lights.
12.7.3The control system consists of a 3−step
control responsive to 7, 5, and/or 3 microphone
clicks. This 3−step control will turn on lighting
facilities capable of either 3−step, 2−step or 1−step
operation. The 3−step and 2−step lighting facilities
can be altered in intensity, while the 1−step cannot.
All lighting is illuminated for a period of 15 minutes
from the most recent time of activation and may not
be extinguished prior to end of the 15−minute period
(except for 1−step and 2−step REILs which may be
turned off when desired by keying the mike 5 or
3times, respectively).
AIP
United States of America
AD 1.1−7
15 MAR 07
Federal Aviation Administration Nineteenth Edition
TBL AD 1.1−2
Runways With Approach Lights
Lighting System
Number of
Intensity
Steps
Status During
Nonuse Period
Intensity Step Selected Per Number
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   
HIRL 5 Off or Low   
VASI 2 Off   
NOTES:Predetermined intensity step.
Low intensity for night use. High intensity for day use as determined by photocell control.
TBL AD 1.1−3
Runways Without Approach Lights
Lighting System
Number of
Intensity
Steps
Status During
Nonuse Period
Intensity Step Selected Per Number
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 2 Off   
REIL 1 Off Off On / Off On
REIL 3 Off Low Med. High
NOTES:Low intensity for night use. High intensity for day use as determined by photocell control.
The control of VASI and/or REIL may be independent of other lighting systems.
12.7.4Suggested use is to always initially key the
mike 7 times; this assures that all controlled lights are
turned on to the maximum available intensity. If
desired, adjustment can then be made, where the
capability is provided, to a lower intensity (or the
REIL turned off) by keying 5 and/or 3 times. Due to
the close proximity of airports using the same
frequency, radio controlled lighting receivers may be
set at a low sensitivity requiring the aircraft to be
relatively close to activate the system. Consequently,
even when lights are on, always key mike as directed
when overflying an airport of intended landing or just
prior to entering the final segment of an approach.
This will assure the aircraft is close enough to activate
the system and a full 15 minutes lighting duration is
available. Approved lighting systems may be
activated by keying the mike (within 5 seconds) as
indicated in TBL AD 1.1−4.
TBL AD 1.1−4
Radio Control System
Key Mike Function
7 times within
5 seconds
Highest intensity available
5 times within
5 seconds
Medium or lower intensity
(Lower REIL or REIL-off)
3 times within
5 seconds
Lowest intensity available
(Lower REIL or REIL-off)
AIP
United States of America
AD 1.1−8
15 MAR 07
Nineteenth Edition Federal Aviation Administration
12.7.5The Airport/Facility Directory contains the
types of lighting, runway, and the frequency that is
used to activate the system for all public use airports
with FAA standard systems. Airports with instrument
approach procedures include data on the approach
chart identifying the light system(s), the runway on
which they are installed, and the frequency that is
used to activate the system(s).
NOTE−
Although the CTAF is used to activate the lights at many
airports, other frequencies may also be used. The
appropriate frequency for activating the lights on the
airport is provided in the Airport/Facility Directory and
the standard instrument approach procedures publications.
It is not identified on the sectional charts.
12.7.6Where the airport is not served by an
instrument approach procedure, it may have either
the standard FAA approach control system or an
independent type system of different specification
　
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