![]() ![]() When a VOR, DME, VORTAC, VOR/DME, TACAN, NDB, or compass locator facility including locator outer marker and locator middle marker is operational and the respective aircraft is equipped with operational navigation equipment that is compatible with conventional navaids. This category of use is referred to as “substitute means of navigation.”Ģ. For example, if equipped with a suitable RNAV system, a pilot may hold over an out-of-service NDB. When a very-high frequency omni-directional range (VOR), DME, tactical air navigation (TACAN), VORTAC, VOR/DME, nondirectional beacon (NDB ), or compass locator facility including locator outer marker and locator middle marker is out-of-service (that is, the navigation aid (navaid) information is not available) an aircraft is not equipped with an ADF or DME or the installed ADF or DME on an aircraft is not operational. ![]() This paragraph sets forth policy concerning the operational use of RNAV systems for the following applications within the U.S. Use of Suitable Area Navigation (RNAV) Systems on Conventional Procedures and RoutesĪ. In the AFMS for other GPS Navigators such as the GNS530W, it states that if the approach is not approved for GPS such as an ILS, the CDI must have the ILS displayed on it and the GPS cannot be used for navigation. ![]() Activating a Vector-to-Final (VTF see the Flight Management Section) also causes the CDI to switch to LOC navigation source GPS steering guidance is not provided after this switch.
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