2-51. RADIO SET (Figure 2-4: item 13)
Survival vests may contain these radios: ARC-RT10, AN/UPC-68 or
Set receiver to guard channel 243.0 for initial contact.
Do not change channels unless told to do so by
To operate the ARC-AT-10 pull the antenna all the way
out until the base ring is visible. This turns the radio set on. To
transmit voice, push in the transmit lever, located on the side of the
radio, hold the speaker microphone close, and speak in a normal
voice. To transmit and monitor tone, push in the transmit lever and
hold, then push the tone button down to the stop. The battery
provided will operate the receiver-transmitter for approximately 30
hours at 68°F or for 15 hours at 32°F on a duty cycle of
approximately 50% transmit and 50% receive. Range of the ARC-
AT-10 is line-of- sight operations approximately 20 miles for
homing and 10 miles for voice contact.