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 TM 55-1905-220-14-1
1-84. INTERIOR COMMUNICATION EQUIPMENT.
a. All Interior Communication Circuits requiring 115 volt AC power are fed from the IC panel L-107, located on the
Starboard bulkhead of the Pilothouse. The 24 volt DC circuits are fed from panel P-24.
b. Operational procedures of the various Interior Communications Systems include little more than powering the
circuits. The ship's Interior Communication Systems include the following circuits:
CIRCUIT 1JV
- Sound powered telephone system, string type maneuvering and docking circuit.
CIRCUIT E
- Call bell circuit for sound powered telephone stations .
CIRCUIT ECW3
- Low lube oil pressure and high water temperature alarm for Port (Forward) Main Propulsion Unit.
CIRCUIT ECW6
- Low lube oil pressure and high water temperature alarm for Starboard (Aft) Main Propulsion Unit.
CIRCUIT ECW5
- Low lube oil pressure and high water temperature alarm for Port (Aft) Generator Diesel Engine.
CIRCUIT ECW4
- Low lube oil pressure and high water temperature alarm for Starboard (Forward) Generator Diesel
Engine .
CIRCUIT F
- High temperature magazine alarm.
CIRCUIT FH
- Magazine sprinkling alarm.
CIRCUIT FR
- Fixed Halon Fire Detection and Extinguishing System.
CIRCUIT NH
- Navigation Horn Operating System.
CIRCUIT KM
- Propulsion Engine Revolution Indicator System.
CIRCUIT LC
- Gyrocompass System.
CIRCUIT 1N
- Rudder Angle Indicator System.
CIRCUIT 5T
- Sewage Tank High Level Alarm System.
CIRCUIT 5U
- Cease Fire Signaling System.
CIRCUIT TL
- Tank Level Indicating System.
CIRCUIT RMHS
- Remote Magnetic Heading System.
CIRCUIT SE
- Ship's Entertainment System.
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