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M0205/18 - NELLIS TACAN UNMONITORED. 06 MAR 21:30 2018 UNTIL 05 APR 23:59 2018. CREATED: 05 MAR 23:00 2018
VOR Station Signals Unmonitored VOR • VORs, VORTACs, and TACANs have an automatic course alignment and signal monitor (ACM). The ACM is usually connected to a remote alarm. When the ACM detects a malfunction, the unit switches to a standby transmitter. If the standby transmitter does not work properly, the facility will shut down. • “Unmonitored" means that there is no ability to observe the VOR’s operational status due to a problem or because the VOR was not designed to be monitored – An unmonitored VOR / DME is likely functioning normally • To use, tune and identify the unmonitored VOR • If a reliable signal is not received, notify ATC so they may conﬁrm if the VOR is out-of-service • A reliable signal can be used – BUT maintain a constant listening watch on the frequency and vigilantly watch for flags.