Figure 5-7 -- NAVAID monitor.
When an alarm system of a NAVAID monitoring device goes off, you should receive a
non-automatic standby equipment into operation indication. Whether the equipment has
changeover features or not you should notify the technician responsible for
maintenance of the NAVAID equipment to provide for rapid repairs.
If the NAVAID has to be shut down or is unreliable, you should immediately notify the
appropriate persons or facilities, which are determined locally. These authorities
generally include the duty officer, the associated approach control (if not located in the
tower), airborne aircraft, and the ARTCC in whose area of responsibility the station is
Where an indication of NAVAID status is required at positions other than at the primary
(remote) monitor, an additional indicator may be installed to provide a slave indication
from the primary (remote) monitor.
Visual communication (VISCOM) is installed in virtually all Navy control towers.
VISCOM is one means used to coordinate between the RADAR controller and the local
controller (see Figure 5-8).