Applications and Petitions: None Answers and Replies: ADSB Out Performance Requirements to Support ATC - Comments of NTSB Orders and Notices: None Rules and Regulations: None Grant of Petitions: None

	ADSB Out Performance Requirements to Support ATC FAA-2007-29305 February 14, 2008 Comments of National Transportation Safety Board The Safety Board is very concerned that the FAA does not plan to require ADS-B In capability because, according to the NPRM, it "has not been identified as a requirement for maintaining the safety and efficiency of NAS operations." The Board believes that this assessment is incorrect and that the equipage of aircraft with ADS-B In capability will provide an immediate and substantial contribution to safety, especially during operations in and around airports. The Safety Board supports the use of ADS-B and believes that ADS-B Out will provide a safety benefit in the NAS in those areas not currently equipped with radar equipment. However, the Board is concerned that this NPRM does not propose requiring ADS-B In, which would be instrumental in providing additional safety information that would prevent incidents such as runway incursions. By: Mark Rosenker Index