GPS can be used in lieu of DME and ADF on all localizer-type approaches as well as VOR/DME approaches, including when charted NDB or DME transmitters are temporarily out of service. … This approval represents a major step toward removing the need to retain DME or ADF in our cockpits for any reason.

Does GPS distance equal DME?

GPS and DME are two separate systems that calculate two different types of distance. GPS calculates your distance across the ground, while DME calculates slant range.

Can GPS replace VOR?

When a VOR is decommissioned, it is replaced with a GPS based intersection and GPS based airways. For most of us, the effect will be minimal. Only the rare GA aircraft that is still navigating solely by VORs will see an impact—and that is still years away.