Section 2. Frequencies

15-2-1. VOR AND VORTAC VOICE CHANNELS

Provide control lines for air-ground communications and Category I monitoring on all VORs and VORTACs as follows:

a. Provide independent transmitting and receiving lines to the controlling FSS when a remote communications outlet is associated with the VOR or the VORTAC.

b. Provide one line when a remote communications outlet has only a 122.1 MHz receiver.

c. Control lines are not required if line costs considerably exceed normal costs and cannot be justified in a particular case.

15-2-2. UHF EN ROUTE CHANNEL

Frequency 255.4 MHz must be the UHF channel for en route communications with military aircraft and must be provided as necessary to meet military en route requirements.