Which international organization works closely with ICAO for civil aviation regulations?

The international organization that works closely with the International Civil Aviation Organization (ICAO) for civil aviation regulations is the Federal Aviation Administration (FAA). The FAA is the national aviation authority in the United States and plays a significant role in developing and implementing regulations that align with ICAO standards and recommendations. It helps ensure that civil aviation in the U.S. complies with international regulations and that U.S. policies contribute to the safety, efficiency, and sustainability of global aviation.

The FAA collaborates with ICAO to address issues such as air traffic management, safety management systems, and environmental regulations, ensuring that there is consistency in aviation practices worldwide. This relationship is crucial for maintaining global aviation standards and fostering international cooperation in air transport.

In contrast, the National Transportation Safety Board (NTSB) primarily focuses on investigating transportation accidents and making safety recommendations, rather than on the regulation of aviation. The Department of Transportation (DOT) oversees various modes of transportation in the U.S. but does not engage directly with ICAO in civil aviation regulation in the same manner as the FAA. NASA's involvement in aviation is related more to research and development, space exploration, and scientific advancements rather than regulatory oversight.