The pilot flying the Asiana Airlines jet that crashed in San Francisco this year, killing three people, was worried about landing successfully because a system used to guide planes
down to the runway had been turned off during a construction project.
The government had said it aimed to replace the VOR with a new Communications, Navigation, Surveillance and Air Traffic Management (CNS-ATM) system that would use satellite information instead of land-based radars to guide planes
to their destinations.
The judge said the walkouts by 190 staff who guide planes
in and out of parking places, which have resulted in the cancellations of thousands of flights, were illegal and that the workers had a duty to keep industrial peace.
Walkouts by the employees who guide planes
to parking places started on February 16, but have so far had a limited impact at Frankfurt, Europe's third-busiest airport as measured by passenger numbers.
"In this state of anxiety, it is impossible to guide planes
Over the period covered by the accounts, the airport also had to shell out pounds 4.6m on getting the runway resurfaced and pounds 900,000 on upgrading its Instrument Landing System, which helps guide planes
But it does have two other systems that many other airports use worldwide - a high frequency directional radio system that pilots use to navigate their aircraft, and a non-directional beacon that also helps guide planes
into the airport.