Page 342 - Planning and Design of Airports

300 Airp o r t D e sign

2400'

500' 500' 400' 1000'

MALSR
SSALR

Sequential Flashers
Red Lights
White Lights
(c)

1400'

500' 500' 400'

MALSF

Sequential Flashers
Red Lights
White Lights
(d)
FIGURE 8-5a–d Approach lighting system confi gurations.

the runway alignment indicator lights and these are only provided in the
outermost 400 ft of the 1400-ft system to improve pilot recognition of
the runway approach in areas where there are distracting lights in the
vicinity of the airport. The MALS system does not have the runway
alignment indicator lights or the sequential flashers.
At international airports in the United States, the 2400-ft ALSs are
often extended to a distance of 3000 ft to conform to international
specifications.