info on nifog channels from macs 441-1

15. Unless otherwise specified by NIFC, utilize tone 7 (167.9 Hz) on
transmit and receive.

this apparently applies to just the NIFOG channels

189 Base-FixedMobile NIFC C8 3, 4, 5, 11, 13, 14, 15, 18 169.5375 0.0
164.7125 OST N L A NIFC Command 8 / AKA: NIFOG NC1

190 Base-FixedMobile NIFC C9 3, 4, 5, 11, 13, 14, 15, 18 170.0125 0.0
165.2500 OST N L A NIFC Command 9 / AKA: NIFOG IR1

191 Base-FixedMobile NIFC C10 3, 4, 5, 11, 13, 14, 15, 18 170.4125 0.0
165.9625 OST N L A NIFC Command 10 / AKA: NIFOG IR2

192 Base-FixedMobile NIFC C11 3, 4, 5, 11, 13, 14, 15, 18 170.6875 0.0
166.5750 OST N L A NIFC Command 11 / AKA: NIFOG IR3

193 Base-FixedMobile NIFC C12 3, 4, 5, 11, 13, 14, 15, 18 173.0375 0.0
167.3250 OST N L A NIFC Command 12 / AKA: NIFOG IR4