Visibility Marker Ball
Have you ever seen those big yellow, orange, white or red balls hanging from power lines and wondered what they’re used for?
They’re called vis...
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Have you ever seen those big yellow, orange, white or red balls hanging from power lines and wondered what they’re used for?
They’re called visibility marker balls or marker balls. You’ll often find them near mountain passes, in the deep valley areas, near major freeway crossings and around airports. They weight about 17 pounds each.
The marker balls are placed on power lines to make the conductor crossings visible to aircraft. Helicopters and small aircraft often fly low in mountain passes or freeways and usually fly low while approaching an airport.
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They’re called visibility marker balls or marker balls. You’ll often find them near mountain passes, in the deep valley areas, near major freeway crossings and around airports. They weight about 17 pounds each.
The marker balls are placed on power lines to make the conductor crossings visible to aircraft. Helicopters and small aircraft often fly low in mountain passes or freeways and usually fly low while approaching an airport.
Read less
Feb, 2019Views
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