TM 55-1930-209-14&P-1
5-3.3 Walkie-talkies. Three walkie-talkies provide short-distance communications (normally less than five miles) on
three preset frequencies in the FCC-assigned marine radio band. They provide communications between crewmembers
carrying these transceivers, with the commercial marine sets In the barge dayroom and workboat cabin, and other radio
equipment operating on the same frequencies within the marine VHF/FM radio band. Transmission distance is normally 5
miles or less.
5-4 Special limitations. Operation of commercial marine radios must be in accordance with FCC regulations. Operation
of Army radios must follow Army SSI/SOI. For specifics, refer to applicable service manual/instructions. According to
FCC regulations, marine radios are licensed primarily for safety of life and property. Therefore, distress and safety
communications have absolute priority. However, frequencies that are not reserved may be used for ship-to-ship and
ship-to-shore official communications.
5-5 Performance characteristics
a.
Army radio (AN/VRC-46 HF/FM transceiver)
Frequency range
30 to 75.95 MHz
Channels
920
RF output power
Low-0.5 to 10 W
High-35 to 65 W
Transmission distance
About 5 miles on low power;
about 25 miles on high power
(1)
Army radio power supply PP-6224 A/U (Barge 1) or PP-2953/U (Barges 2 and 3) regulated power
supply
Power input
115/230 Vac, 60 Hz
Regulated power output
25 2 Vdc at 10 Amp
(2)
Army radio HF antenna (AS-1729/VRC HF antenna)
Frequency range
30 to 76 MHz
Power handling capability
70 W, maximum
b.
Marine radio (C866S VHF/FM marine transceiver)
Input voltage
13.8 Vdc (±20 percent)
Frequency range
156.250-162.550 MHz
Channels - Receive -
50
Transmit -
46
RF power output
Low - 1 W
High - 25 W
(1)
Marine radio antenna (VHF antenna)
Frequency range
156.025 to 157.8 MHz
(2)
Marine radio power supply (NPC LR 10 regulated dc power supply)
Input power requirement
115/230 Vac, 60 Hz
Regulated power output
13 8 Vdc
5-6
