Figure 9. Hood for use in combat area-light patterns available from each setting of the selector knob.
narrow, tri-colored beam of light parallel to the runway
centerline. It can be set for any desired approach angle
up to 15 degrees from the horizontal by means of a
protractor which is mounted on one side. When the
approaching aircraft is in line with the runway, the pilot
sees either the red, green, or amber portion of the beam,
depending on whether his approach is too low, correct,
stake-mounted and placed 200 feet (60.96 meters) from
the approach end, on the left side of the runway as seen
by an approaching pilot.
Figure 10. Glide angle approach light.