The chief executives of major U.S. passenger and cargo carriers on Monday warned of an impending "catastrophic" aviation crisis in less than 36 hours, when AT&T and Verizon are set to deploy new 5G service.

They said the start of Verizon and AT&T 5G mobile phone services, planned for Wednesday, would cause a "completely avoidable economic calamity".

Airlines fear C-band 5G signals will disrupt planes' navigation systems, particularly those used in bad weather.

The warning was issued in a letter sent to US aviation authorities.

The chief executives of American Airlines, Delta Air Lines and United Airlines were joined by others in saying: "Immediate intervention is needed to avoid significant operational disruption to air passengers, shippers, supply chain and delivery of needed medical supplies", including vaccine distribution.

It was sent to Transportation Secretary Pete Buttigieg, as well as the head of the Federal Aviation Administration (FAA), the chair of the Federal Communications Commission and the director of the National Economic Council.

The airlines want 5G signals to be excluded from "the approximate two miles of airport runways at affected airports as defined by the FAA on 19 January 2022".

"This will allow 5G to be deployed while avoiding harmful impacts on the aviation industry, travelling public, supply chain, vaccine distribution, our workforce and broader economy.

"We further ask that the FAA immediately identify those base stations closest to key airport runways that need to be addressed to ensure safety and avoid disruption," they added.

These concerns were recently highlighted by the two big planemakers, Airbus and Boeing, in a rare joint warning.