CAP 1781 – DVOR/DME/NDB Rationalisation

The CAA has published CAP 1781 and CAP 1781b as guidance in support of how airports might mitigate the effect of the removal of conventional navigation aids from December 2022.

From this date, NATS plan to commence decommissioning of DVOR, DME and NDB sites. The two CAPs offer the use of RNAV Substitution as one technique that may be applied in lieu of radiating navigation aids. CAP 1781b contains an Example Safety Approach which may be used in this process.

A companion CAP 1926 will be published shortly detailing the guidance to operators on the use of RNAV Substitution.