The FAA on Nov. 19 extended the comment period for 60 days for the notice of proposed rulemaking (NPRM) on automatic dependent surveillance-broadcast (ADS-B) until March 2008, following requests from industry associations. “The FAA has determined that extension of the comment period is consistent with the public interest, and that good cause exists for taking this action,” according to a notice in the Federal Register. Air Transport Association of America; Air Carrier Association of America; Civil Aviation Aerospace Industries Association; National Air Carrier Association; and Regional Airline Association; Aircraft Owners and Pilots Association and Cargo Airline Association all requested an extension to the comment period. “These petitioners have shown a substantive interest in the proposed rule and good cause for the extension,” according to the Federal Register Notice. FAA issued the NPRM in October setting out performance requirements of the avionics needed to operate in an ADS-B flight regime. The 100-page NPRM proposes that only ADS-B "Out" broadcast capability be required, deferring a mandate for ADS-B "In" equipage "at this time." Aircraft position accuracy would be provided by the GPS Wide Area Augmentation System (WAAS). The document also provides estimated ADS-B equipment and installation costs, ranging from a low of $4,328 for GA aircraft to a high of $463,706 for turboprops.