US National Transportation Safety Board (NTSB) makes meteorological evaluation towers (METs) marking mandatoryMarch 17, 2011 at 8:26 am | Posted in Aviation Law Current Event | Leave a comment
by Sara M. Langston with the blog faculty
A recent FAA proposal that suggested a protocol for marking meteorological evaluation towers to make them more visible to low-level aviators didn’t go far enough, the NTSB says. “The NTSB is concerned that the application of the [FAA Advisory Circular] is voluntary, and, without mandatory application and marking requirements for METs, many METs will still be constructed without notice to the aviation community and will fail to be marked appropriately,” the board said in a Safety Alert (PDF) issued on Friday. Meteorological Evaluation Towers (METs) are used to measure wind speed and direction during the development of wind energy facilities, and many fall just below the 200-foot threshold for FAA-required obstruction markings. At least three fatal accidents have involved MET tower collisions, the NTSB said, the most recent one in January.