Item 5 Radio Set AN/ARC-54 or AN/ARC- 131 and Communications Security Set TSEC/KY-28

RATINGS

PROCEDURE

GREEN

AMBER

RED

Note: A tactical fm station equipped

Strength and readability of signals

Secure communications

No reliable two-way communication possible

with a compatible security encoder

are adequate to maintain reliable

not possible.

from any position in either mode.

and located not less than 1 mile from communications in plain language

the aircraft is required. Set the FM

and secure modes from each

COMM control panel to the frequency position (pilot's. copilot's and troop

of a suitably equipped tactical fm

commander's).

station Set the C-8157/AR(' to

operate in the plain language mode

Set the pilot's. copilot's. and troop

commander's C- 161 I()/AIC for fm

communication. Establish two-way

communication in the plain language

mode from the pilot's. copilot's.

And troop commander's position. In

turn. Set the C-8157/ARC to operate

in the secure mode. Establish two-

way communication in the secure

mode.

Item 6 Radio Set AN/ARC-54 or AN/ARC- 131 and Discrete Signal Discriminator MD-736/A

RATINGS

PROCEDURE

GREEN

AMBER

RED

Note: Establish two-way

Fm reception disabled when each

Fm reception not disabled when one transmitter

communication with a tactical fm

transmitter is keyed from each

is keyed from one position.

station located not less than I mile

position .

from the aircraft Set the FM COMM

control panel to the frequency of a

distant tactical fm station. Set the

pilot's. copilot's, and troop

commander's C- 161 I(*)AIC for