TM 55-1930-209-14& P-1 2
C-3.2 Army radio. The HF/FM Army radio provides communications with other stations equipped with radio
frequencies reserved for military (primarily US Army) use. This radio enables the barge to communicate with
its towing vessel, other military support vessels, military shore-based radio stations, and military aircraft.
Transmission distance is normally 25 miles or less.
C-3.3 Commercial marine radios. These provide VHF/FM radio communications between workboat and
barge and between workboat or barge and other vessels equipped with radios working these same channel
frequencies. Transmission distance is normally 25 miles or less.
C-3.4 Walkie-talkies. These preset, crystal-controlled, hand-held, nickel cadmium (ni-cad) battery-powered
portable radios can be preset to the same frequencies available on commercial marine radio channels They
provide VHF/FM communications between crew personnel onboard, between shore and crew personnel, and
between crew personnel on workboat and barge. Transmission distance Is normally 5 miles or less.
C-3.5 Foghorn equipment. This equipment sounds the foghorn to warn oncoming vessels of barge location
during poor visibility.
C-3.6 Telephone system. This system provides intercommunications between dayroom system operator and
crewmembers at any telephone station on the barge.
Telephone stations provide jack receptacles for connecting a headset By using dayroom telephone equipment,
operator can page and communicate with personnel at any telephone station When on line with operator,
crewmembers at telephone statiolis can communicate with operator or crewmembers plugged into other
Table C-1. Preventive Maintenance Checks and Services for Communications Systems