TM 55-1945-205-10-2
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OPERATOR MAINTENANCE
ROLL-ON/ROLL-OFF DISCHARGE FACILITY
THEORY OF OPERATION
SYSTEM OPERATION
The roll-on/roll-off discharge facility (RRDF) is a floating discharge platform for ocean-going roll-on/roll-off sealift
vessels. The modules and equipment comprising the RRDF are pre-positioned aboard ship until needed to support
combat operations. The RRDF is used in support of joint logistics over the shore (J-LOTS) operations. Vehicles are
driven from the ship onto the RRDF and loaded on Army lighterage for transport to a theater of operations. The
structure of the RRDF will withstand the cargo loading through Sea State 2 conditions.
10 KW OR 15 KW SKID MOUNTED TACTICAL QUIET GENERATOR
Refer to TM 9-6115-642-10 for the theory of operation of the 10 KW diesel generator set.
Refer to TM 9-6115-643-10 for the theory of operation of the 15 KW diesel generator set.
PERSONNEL SHELTER
The personnel shelter is contained in a 20 ft ISO container. Power is supplied to the shelter from the tactical quiet
generator through a power cable stored in the shelter and connected from a 100 amp connector on the backside of the
shelter to a 100 amp connector on the generator. The power provided by the generator supplies power to the electrical
distribution panel, which is cabled to the incinerator toilet, heating and cooling unit, lighting, fire suppression system
and to the GFI receptacles in the personnel shelter.
6 KW TRAILER MOUNTED LIGHT TOWER
The lighting system consists primarily of a self-contained, trailer mounted, 6 KW diesel generator which illuminates
the work area using four high pressure sodium 1000 watt lamps. The power to each lamp is controlled by individual
switches on a control panel. The power is received from a 120 VAC - two phase alternator which is cabled through
two 25 amp circuit breakers, to the switches, to a ballast box and connected by quick disconnects to the lights.
VHF/FM HANDHELD TRANSCEIVER
The VHF/FM handheld transceivers are utilized for communicating between personnel during loading and unloading
operations on the RRDF. The transceiver has a frequency range of 156.025 to 163.275 mhz, plus 10 weather channels.
The transceiver has an RF power output with the CNB350 battery of 5.0 watts (high) and 1.0 watts (low). The
operating voltage is 7.2 V DC. Current drain in standby mode is 40 ma, in receive mode 200 ma, in the transmit mode
1.8 amps (high power) and 0.7 amps (low power). The battery life (5% Tx, 5% rcv, 90% standby) is approximately
10 hrs (high mode) and 15 hrs (low mode). The audio response is within +2/-8 of 6 dB/octave pre-emphasis
characteristic from 300 hz to 3000 hz. The AF harmonic distortion of the transmitter is 3%. The transmitter has a hum
and noise rating of 37 dB and a frequency stability (-20 Deg to +50 Deg C) of +/- 0.0005%. The receiver has a
sensitivity rating of 20 dB, quieting at 0.35 uv and 12 dB SINAD at 0.30 uv. The squelch sensitivity (threshold) is
0.20 uv. Modulation acceptance bandwidth is + 4.5 khz.
INCINERATOR TOILET
Refer to TM 55-1925-257-14&P for the theory of operation of the incinerator toilet.
