The newly re-equipped air traffic control centre at Shannon Airport was officially opened yesterday.
The refurbishment by the Irish Aviation Authority (IAA) is part of a larger national investment programme costing some €115 million.
The IAA chairman, Mr Donal Geaney, said that the investment in new air traffic management systems would allow the IAA meet the challenges of the future.
The Shannon control tower is now equipped with the Eurocat 2000 system supplied by Thales ATM, a leading provider of air traffic management solutions.
However, the same system at Dublin Airport encountered problems last Sunday morning.
The authority confirmed at the weekend that part of the new system at Dublin Airport had failed while handling "live" aircraft.
It failed to identify aircraft on radar screens on what was one of the busiest mornings at the airport so far this year.
The IAA confirmed that, as soon as the fault was detected, there was an immediate "switch-over" to the old system, which has been on standby as a precautionary safety measure since the new technology was introduced last month.
An IAA spokesman said the changeover was "seamless", and that safety had not been compromised.
The IAA stressed that Sunday's incident showed that the air traffic controllers' safety systems worked.