5-30. MARKING THE LANDING SITE AT NIGHT
At night, the landing site and the touchdown point are marked by an inverted "Y"
composed of four lights visible to the helicopter pilot (figure 5-25). Two lights are placed
seven meters from the touchdown site on opposite sides of the site. A third light is placed 14
meters from the touchdown site perpendicular to the line formed by the first two lights.
A fourth light is placed seven meters beyond the third light and in line with the touchdown
a. Strobe lights, flashlights, lanterns, or vehicle lights may also be used to mark
the landing site. The marking system used can be fully explained to the pilot when
contact is made.
b. Flare pots and other types of open flames should be used only as a last
resort. They are usually blown out by the rotor downwash, can create a hazardous
glare or reflection on the helicopter windshield, and can be a fire hazard if blown over.
c. Lights are displayed for a minimum time only and are turned off immediately
after the helicopter lands or when ordered to do so by the pilot.
Figure 5-25. Marking a landing site at night with lights.