TM 55-1930-209-14&P-1
5-3 Capabilities.
5-3.1 Army radio. The Army radio provides HF/FM communications with other military radio stations operating on
frequencies within the band assigned for military use. These may include other military ships such as Army or Navy
tugboats, military commanders and their headquarters and staffs, and military bases ashore. Transmission distance
normally is 25 miles or less.
5-3.2 Commercial marine radios. Commercial marine radios provide VHF/FM radio communications with commercial
(nonmilitary) radio stations equipped to operate in the FCC-assigned marine radio band (156.250-162.550 MHz). These
may include commercial tugboats, other commercial vessels, commercial shore stations allied with ships and seagoing
activities and United States Coast Guard (USCG) ships and stations. Transmission distance is normally 25 miles or less.
Table 5-1. Radio Communications System Major Components
Component/Quantity
Location
Function
Army AN/VRC-46 transceiver/1
Mounted on shelf on aft bulkhead in dayroom
For radio communications with
military stations
Army M-80/GR microphone/1
Connected to AN/VRC-46 transceiver on aft
For transmitting voice messages
bulkhead in dayroom
Army PP-6224 A/U (Barge 1)
Mounted on shelf on aft bulkhead in dayroom
Provides a regulated +25.2 VDC
Army PP-2953/U (Barges 2
for AN/VRC-46 transceiver
and 3) power supply/1 ea
operation
Army HF antenna AS-1729/
Mounted on deckhouse top, starboard
For receiving or transmitting radio
VRC/1
waves
Marine C866S VHF/FM
Mounted under shelf on aft bulkhead in
For radio communications within
transceiver/2
dayroom and in workboat cabin
FCC-assigned commercial marine
band
Marine regulated DC power
Mounted on shelf on aft bulkhead in
Supplies a regulated +13.8 Vdc
supply/1
dayroom
power supply for 866S VHF/FM
marine transceiver operation
Marine VHF antenna/2
Mounted on deckhouse top, starboard and
For receiving or transmitting radio
on workboat cabin
wave
HX500S VHF/FM marine
Positioned in battery charger on portside of
For radio communications within
handheld transceivers
operator’s desk or workshop rack
the FCC-assigned commercial
(walkie-talkies)/3
marine band
Handheld transceiver
Mounted in workshop on supply rack
Supplies a 7.5 Vdc output for
CSB50AM battery
charging ni-cad battery packs
charger/1
ni-cad battery packs
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The barge has two marine band radios, one in the barge dayroom and the other in the workboat cabin. These are
identical pieces of equipment, operate in the same manner, on the same channels/frequencies, and are interchangeable.
The barge mounted radio has a separate power supply to provide proper voltage for radio operation. The workboat
mounted radio uses power from the workboat electrical system.
5-2
