National Transportation Safety Board
Office of Public Affairs
The National Transportation Safety Board today issued a Safety Alert to warn pilots of low-flying aircraft about the dangers associated with unmarked towers built to record weather observations.
The Meteorological Evaluation Towers (METs), many of which fall just below the 200-foot Federal Aviation Administration threshold for obstruction markings, can be difficult to see from the air and can be a danger to aircraft conducting low-flight operations, including helicopter emergency services, law enforcement, fire suppression and other low-altitude activities.
Pilots are urged to maintain vigilance during low-altitude flights and are asked to encourage the markings of METs in their area.
Since 2003 the NTSB has investigated three fatal accidents involving in-flight collisions with METs, including one in January.
The NTSB has previously issued 15 Safety Alerts on aviation, boating and highway safety.
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The National Transportation Safety Board (NTSB) is an independent federal agency charged with determining the probable cause
of transportation accidents, promoting transportation safety, and assisting victims of transportation accidents and their families.