They Could Be In Danger
Furthermore, “accurately judging the helicopter’s distance from unmarked wires is nearly impossible,” according to the report. Even a pilot who takes the same route back and forth from the airport could be put in danger if the shape of the wires changes with the seasons, the color of the cables changes, or another optical illusion occurs.
They Could Be In Danger
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Visibility Marker Balls
In the aviation field, there are some places where you’re more likely to see these spheres known as visibility marker balls. They hang out in places where planes and helicopters frequently fly low, such as canyons, mountain passes, valleys, and over freeways and near airports.
Visibility Marker Balls