Boeing and Airbus raise 5G safety alarm

Executives from Boeing and Airbus have urged the US government to delay the launch of 5G services by Verizon and AT&T, citing concerns that the C band spectrum could interfere with aircraft equipment like radio altitude meters. This interference could affect pilots' ability to navigate, especially in poor visibility conditions. United Airlines' CEO, Scott Kirby, highlighted that new FAA 5G directives could impact operations at major airports. A joint letter from airline manufacturers noted that if 5G rules had been in place in 2019, numerous flights would have faced delays or cancellations.

What specific airport operations could be affected by the new 5G directives?

What impact could the 5G rules have had on passenger flights in 2019 according to the letter from airline makers?