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AirNav Ireland provides air traffic management services including: Air Traffic Control Flight information Alerting and search and rescue services Aeronautical information North Atlantic Communications

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AirNav Ireland provides air traffic management services in the 451,000 km2 of airspace controlled by Ireland. This airspace forms a crucial gateway for air traffic between Europe and North America.

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8.33kHz Voice Channel Spacing Implementation - Exemption Extended

22 December 2025

Subject: Exemption on 8.33 kHz Channel Spacing – Shannon FIR

The Irish Aviation Authority (IAA) has acknowledged the issues raised transitioning the voice radios to 8.33kHz spacing and an exemption has been granted to the requirement for 8.33 kHz channel spacing frequency assignments within the Shannon FIR, as outlined in Article 3(f) of Regulation (EU) 2017/373.

This exemption is effective immediately and will remain in effect for a number of months. It is intended to support a safe and coordinated transition to 8.33 kHz channel spacing while maintaining operational continuity.

Retention of 25 kHz Channel Spacing:

Voice frequency assignments currently operating at 25 kHz, which have limited impact on the network, will remain valid during the exemption period.

Phased Transition Plan:

The State will implement the transition to 8.33 kHz frequency assignments described in ENR 1.8.7 on a phased basis, in close coordination with airfields and aircraft operators.

Ongoing Review:

All frequency assignments will remain subject to continuous review by the National Frequency Manager.

Next Steps

AirNav Ireland will engage with stakeholders to ensure a smooth transition and address any operational considerations. Your collaboration is essential to achieving this transition to 8.33kHz spacing in a safe and efficient manner.

If you have any questions or require clarification, please contact the National Frequency Manager or [email protected].

Thank you for your continued cooperation and support