Additional assurance measures for the coexistence of wireless broadband services and radio altimeters

The interim mitigations for coexistence between radio altimeters, operating in the 4200–4400 MHz band, and wireless broadband systems, operating in the 3700–4000 MHz band, will expire in March 2026. In addition, new radio altimeter operational requirements are being considered by the Civil Aviation Safety Authority (CASA).

We have considered the operating environment after the interim mitigations are lifted and are proposing new voluntary assurance measures that will apply to wireless broadband services after the interim mitigations end.

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We welcome your feedback by 5 pm (AEDT) on Friday 6 February 2026.